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ERR_ELECTRON_BUILDER_CANNOT_EXECUTE when trying to build a desktop app for Ubunto #884

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opened 2026-01-29 16:51:12 +00:00 by claunia · 12 comments
claunia commented 2026-01-29 16:51:12 +00:00
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Originally created by @sam-wheat on GitHub (Apr 25, 2023).

I believe I am having a similar problem to what is found here and here. The error message I get is different so I will write a new issue. My goal is to produce a desktop app that will run on Linux. Per this issue I think what I am doing is supported.

Environment:

Windows 10 22H2 19045.2846

Visual Studio 2022 / latest

Unbutu running on WSL2 same physical machine as Windows

sam@UGLY:~/stuff/BlazorServerTest1$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 22.04.2 LTS
Release: 22.04
Codename: jammy

dotnet, node and x11 are installed. xeyes/gedit runs correctly.

My app is Hello World, only mods from default Blazor template are to install Electron.Net
Electron.Net versions 23.6.1 and 23.6.2-alpha-13 - both give same result.

Steps to reproduce
On Windows open command line in .csproj folder:

dotnet electronize start

This works fine - Blazor runs in an Electron window.

In same command window:

C:\Projects\BlazorServerTest1\BlazorServerTest1>dotnet electronize build /target linux

Build Electron Application...
Arguments:
target = linux
Build ASP.NET Core App for linux-x64...
Executing dotnet publish in this directory: C:\Projects\BlazorServerTest1\BlazorServerTest1\obj\desktop\linux
Build ASP.NET Core App for linux-x64 under Release-Configuration...
dotnet publish -r linux-x64 -c "Release" --output "C:\Projects\BlazorServerTest1\BlazorServerTest1\obj\desktop\linux\bin" /p:PublishReadyToRun=true /p:PublishSingleFile=true --self-contained
dotnet publish -r linux-x64 -c "Release" --output "C:\Projects\BlazorServerTest1\BlazorServerTest1\obj\desktop\linux\bin" /p:PublishReadyToRun=true /p:PublishSingleFile=true --self-contained
MSBuild version 17.5.1+f6fdcf537 for .NET
Determining projects to restore...
Restored C:\Projects\BlazorServerTest1\BlazorServerTest1\BlazorServerTest1.csproj (in 345 ms).
BlazorServerTest1 -> C:\Projects\BlazorServerTest1\BlazorServerTest1\bin\Release\net6.0\linux-x64\BlazorServerTest1.dll
BlazorServerTest1 -> C:\Projects\BlazorServerTest1\BlazorServerTest1\obj\desktop\linux\bin\

Start npm install...
npm install --production

added 49 packages, and audited 50 packages in 8s

found 0 vulnerabilities

ElectronHostHook handling started...
Build Electron Desktop Application...
Executing electron magic in this directory: C:\Projects\BlazorServerTest1\BlazorServerTest1\bin\desktop
Create electron-builder configuration file...
node build-helper.js electron.manifest.json

Package Electron App for Platform linux...
npx electron-builder --config=./bin/electron-builder.json --linux --x64 -c.electronVersion=23.2.0
ΓÇó electron-builder version=23.6.0 os=10.0.19045
ΓÇó loaded configuration file=C:\Projects\BlazorServerTest1\BlazorServerTest1\obj\desktop\linux\bin\electron-builder.json
ΓÇó description is missed in the package.json appPackageFile=C:\Projects\BlazorServerTest1\BlazorServerTest1\obj\desktop\linux\package.json
ΓÇó packaging platform=linux arch=x64 electron=23.2.0 appOutDir=C:\Projects\BlazorServerTest1\BlazorServerTest1\bin\Desktop\linux-unpacked
ΓÇó scheduling remote build target=snap arch=x64
ΓÇó scheduling remote build target=appImage arch=x64
ΓÇó cannot get, wait error=Get "https://service.electron.build/find-build-agent?no-cache=1i4dems": dial tcp 51.15.76.176:443: connectex: No connection could be made because the target machine
actively refused it.
attempt=0
waitTime=2
ΓÇó cannot get, wait error=Get "https://service.electron.build/find-build-agent?no-cache=1i4dems": dial tcp 51.15.76.176:443: connectex: No connection could be made because the target machine
actively refused it.
attempt=1
waitTime=4
ΓÇó cannot get, wait error=Get "https://service.electron.build/find-build-agent?no-cache=1i4dems": dial tcp 51.15.76.176:443: connectex: No connection could be made because the target machine
actively refused it.
attempt=2
waitTime=6
Γ¿» Get "https://service.electron.build/find-build-agent?no-cache=1i4dems": dial tcp 51.15.76.176:443: connectex: No connection could be made because the target machine actively refused it.
Γ¿» C:\Users\sam\AppData\Local\npm-cache_npx\009083ec26dc578f\node_modules\app-builder-bin\win\x64\app-builder.exe process failed ERR_ELECTRON_BUILDER_CANNOT_EXECUTE
Exit code:
1 failedTask=build stackTrace=Error: C:\Users\sam\AppData\Local\npm-cache_npx\009083ec26dc578f\node_modules\app-builder-bin\win\x64\app-builder.exe process failed
ERR_ELECTRON_BUILDER_CANNOT_EXECUTE
Exit code:
1
at ChildProcess. (C:\Users\sam\AppData\Local\npm-cache_npx\009083ec26dc578f\node_modules\builder-util\src\util.ts:250:14)
at Object.onceWrapper (node:events:510:26)
at ChildProcess.emit (node:events:390:28)
at ChildProcess.cp.emit (C:\Users\sam\AppData\Local\npm-cache_npx\009083ec26dc578f\node_modules\cross-spawn\lib\enoent.js:34:29)
at maybeClose (node:internal/child_process:1064:16)
at Process.ChildProcess._handle.onexit (node:internal/child_process:301:5)
From previous event:
at processImmediate (node:internal/timers:464:21)
From previous event:
at RemoteBuilder.build (C:\Users\sam\AppData\Local\npm-cache_npx\009083ec26dc578f\node_modules\app-builder-lib\src\remoteBuilder\RemoteBuilder.ts:51:28)
at RemoteTarget.finishBuild (C:\Users\sam\AppData\Local\npm-cache_npx\009083ec26dc578f\node_modules\app-builder-lib\src\linuxPackager.ts:105:30)
at async Promise.all (index 2)
at AsyncTaskManager.awaitTasks (C:\Users\sam\AppData\Local\npm-cache_npx\009083ec26dc578f\node_modules\builder-util\src\asyncTaskManager.ts:65:25)
at Packager.doBuild (C:\Users\sam\AppData\Local\npm-cache_npx\009083ec26dc578f\node_modules\app-builder-lib\src\packager.ts:453:5)
at Object.executeFinally (C:\Users\sam\AppData\Local\npm-cache_npx\009083ec26dc578f\node_modules\builder-util\src\promise.ts:12:14)
at Packager._build (C:\Users\sam\AppData\Local\npm-cache_npx\009083ec26dc578f\node_modules\app-builder-lib\src\packager.ts:376:31)
at Packager.build (C:\Users\sam\AppData\Local\npm-cache_npx\009083ec26dc578f\node_modules\app-builder-lib\src\packager.ts:337:12)
at Object.executeFinally (C:\Users\sam\AppData\Local\npm-cache_npx\009083ec26dc578f\node_modules\builder-util\src\promise.ts:12:14)

... done

Despite the above error msg binaries are still produced in bin\Desktop\linux-unpacked\resources\bin.

Copy files in folder above to home folder in WSL file subsystem. In my case this is \\wsl.localhost\Ubuntu\home\sam\stuff\BlazorServerTest1

In a terminal window on the Linux VM run the following:

sam@UGLY:~/stuff/BlazorServerTest1$ chmod 777 BlazorServerTest1


sam@UGLY:~/stuff/BlazorServerTest1$ ./BlazorServerTest1

Unhandled exception. SocketIOClient.ConnectionException: Cannot connect to server 'http://localhost/'
---> System.TimeoutException: The operation has timed out.
--- End of inner exception stack trace ---
at SocketIOClient.SocketIO.ConnectAsync()
at ElectronNET.API.SocketIoFacade.Connect()
at ElectronNET.API.BridgeConnector.get_Socket()
at ElectronNET.API.WindowManager.CreateWindowAsync(BrowserWindowOptions options, String loadUrl)
at ElectronNET.API.WindowManager.CreateWindowAsync(String loadUrl)
at BlazorServerTest1.Program.ElectronBootstrap() in C:\Projects\BlazorServerTest1\BlazorServerTest1\Program.cs:line 80
at BlazorServerTest1.Program.<>c__DisplayClass0_0.<

b__0>d.MoveNext() in C:\Projects\BlazorServerTest1\BlazorServerTest1\Program.cs:line 36
--- End of stack trace from previous location ---
at System.Threading.Tasks.Task.<>c.b__128_1(Object state)
at System.Threading.QueueUserWorkItemCallbackDefaultContext.Execute()
at System.Threading.ThreadPoolWorkQueue.Dispatch()
at System.Threading.PortableThreadPool.WorkerThread.WorkerThreadStart()
at System.Threading.Thread.StartCallback()
Aborted

Am I supposed to have a HTTP server runing on the Linux machine? Error message references files on my windows machine.... IDK why.

Originally created by @sam-wheat on GitHub (Apr 25, 2023). I believe I am having a similar problem to what is found [here](https://github.com/ElectronNET/Electron.NET/issues/713) and [here](https://github.com/ElectronNET/Electron.NET/issues/750). The error message I get is different so I will write a new issue. My goal is to produce a desktop app that will run on Linux. Per [this issue](https://github.com/ElectronNET/Electron.NET/issues/597) I think what I am doing is supported. Environment: Windows 10 22H2 19045.2846 Visual Studio 2022 / latest Unbutu running on WSL2 same physical machine as Windows > sam@UGLY:~/stuff/BlazorServerTest1$ lsb_release -a > No LSB modules are available. > Distributor ID: Ubuntu > Description: Ubuntu 22.04.2 LTS > Release: 22.04 > Codename: jammy dotnet, node and x11 are installed. xeyes/gedit runs correctly. My app is Hello World, only mods from default Blazor template are to install Electron.Net Electron.Net versions 23.6.1 and 23.6.2-alpha-13 - both give same result. Steps to reproduce On Windows open command line in .csproj folder: dotnet electronize start This works fine - Blazor runs in an Electron window. In same command window: C:\Projects\BlazorServerTest1\BlazorServerTest1>dotnet electronize build /target linux > Build Electron Application... > Arguments: > target = linux > Build ASP.NET Core App for linux-x64... > Executing dotnet publish in this directory: C:\Projects\BlazorServerTest1\BlazorServerTest1\obj\desktop\linux > Build ASP.NET Core App for linux-x64 under Release-Configuration... > dotnet publish -r linux-x64 -c "Release" --output "C:\Projects\BlazorServerTest1\BlazorServerTest1\obj\desktop\linux\bin" /p:PublishReadyToRun=true /p:PublishSingleFile=true --self-contained > dotnet publish -r linux-x64 -c "Release" --output "C:\Projects\BlazorServerTest1\BlazorServerTest1\obj\desktop\linux\bin" /p:PublishReadyToRun=true /p:PublishSingleFile=true --self-contained > MSBuild version 17.5.1+f6fdcf537 for .NET > Determining projects to restore... > Restored C:\Projects\BlazorServerTest1\BlazorServerTest1\BlazorServerTest1.csproj (in 345 ms). > BlazorServerTest1 -> C:\Projects\BlazorServerTest1\BlazorServerTest1\bin\Release\net6.0\linux-x64\BlazorServerTest1.dll > BlazorServerTest1 -> C:\Projects\BlazorServerTest1\BlazorServerTest1\obj\desktop\linux\bin\ > Start npm install... > npm install --production > added 49 packages, and audited 50 packages in 8s > found 0 vulnerabilities > ElectronHostHook handling started... > Build Electron Desktop Application... > Executing electron magic in this directory: C:\Projects\BlazorServerTest1\BlazorServerTest1\bin\desktop > Create electron-builder configuration file... > node build-helper.js electron.manifest.json > Package Electron App for Platform linux... > npx electron-builder --config=./bin/electron-builder.json --linux --x64 -c.electronVersion=23.2.0 > ΓÇó electron-builder version=23.6.0 os=10.0.19045 > ΓÇó loaded configuration file=C:\Projects\BlazorServerTest1\BlazorServerTest1\obj\desktop\linux\bin\electron-builder.json > ΓÇó description is missed in the package.json appPackageFile=C:\Projects\BlazorServerTest1\BlazorServerTest1\obj\desktop\linux\package.json > ΓÇó packaging platform=linux arch=x64 electron=23.2.0 appOutDir=C:\Projects\BlazorServerTest1\BlazorServerTest1\bin\Desktop\linux-unpacked > ΓÇó scheduling remote build target=snap arch=x64 > ΓÇó scheduling remote build target=appImage arch=x64 > ΓÇó cannot get, wait error=Get "https://service.electron.build/find-build-agent?no-cache=1i4dems": dial tcp 51.15.76.176:443: connectex: No connection could be made because the target machine > actively refused it. > attempt=0 > waitTime=2 > ΓÇó cannot get, wait error=Get "https://service.electron.build/find-build-agent?no-cache=1i4dems": dial tcp 51.15.76.176:443: connectex: No connection could be made because the target machine > actively refused it. > attempt=1 > waitTime=4 > ΓÇó cannot get, wait error=Get "https://service.electron.build/find-build-agent?no-cache=1i4dems": dial tcp 51.15.76.176:443: connectex: No connection could be made because the target machine > actively refused it. > attempt=2 > waitTime=6 > Γ¿» Get "https://service.electron.build/find-build-agent?no-cache=1i4dems": dial tcp 51.15.76.176:443: connectex: No connection could be made because the target machine actively refused it. > Γ¿» C:\Users\sam\AppData\Local\npm-cache\_npx\009083ec26dc578f\node_modules\app-builder-bin\win\x64\app-builder.exe process failed ERR_ELECTRON_BUILDER_CANNOT_EXECUTE > Exit code: > 1 failedTask=build stackTrace=Error: C:\Users\sam\AppData\Local\npm-cache\_npx\009083ec26dc578f\node_modules\app-builder-bin\win\x64\app-builder.exe process failed > ERR_ELECTRON_BUILDER_CANNOT_EXECUTE > Exit code: > 1 > at ChildProcess.<anonymous> (C:\Users\sam\AppData\Local\npm-cache\_npx\009083ec26dc578f\node_modules\builder-util\src\util.ts:250:14) > at Object.onceWrapper (node:events:510:26) > at ChildProcess.emit (node:events:390:28) > at ChildProcess.cp.emit (C:\Users\sam\AppData\Local\npm-cache\_npx\009083ec26dc578f\node_modules\cross-spawn\lib\enoent.js:34:29) > at maybeClose (node:internal/child_process:1064:16) > at Process.ChildProcess._handle.onexit (node:internal/child_process:301:5) > From previous event: > at processImmediate (node:internal/timers:464:21) > From previous event: > at RemoteBuilder.build (C:\Users\sam\AppData\Local\npm-cache\_npx\009083ec26dc578f\node_modules\app-builder-lib\src\remoteBuilder\RemoteBuilder.ts:51:28) > at RemoteTarget.finishBuild (C:\Users\sam\AppData\Local\npm-cache\_npx\009083ec26dc578f\node_modules\app-builder-lib\src\linuxPackager.ts:105:30) > at async Promise.all (index 2) > at AsyncTaskManager.awaitTasks (C:\Users\sam\AppData\Local\npm-cache\_npx\009083ec26dc578f\node_modules\builder-util\src\asyncTaskManager.ts:65:25) > at Packager.doBuild (C:\Users\sam\AppData\Local\npm-cache\_npx\009083ec26dc578f\node_modules\app-builder-lib\src\packager.ts:453:5) > at Object.executeFinally (C:\Users\sam\AppData\Local\npm-cache\_npx\009083ec26dc578f\node_modules\builder-util\src\promise.ts:12:14) > at Packager._build (C:\Users\sam\AppData\Local\npm-cache\_npx\009083ec26dc578f\node_modules\app-builder-lib\src\packager.ts:376:31) > at Packager.build (C:\Users\sam\AppData\Local\npm-cache\_npx\009083ec26dc578f\node_modules\app-builder-lib\src\packager.ts:337:12) > at Object.executeFinally (C:\Users\sam\AppData\Local\npm-cache\_npx\009083ec26dc578f\node_modules\builder-util\src\promise.ts:12:14) > ... done Despite the above error msg binaries are still produced in `bin\Desktop\linux-unpacked\resources\bin`. Copy files in folder above to home folder in WSL file subsystem. In my case this is `\\wsl.localhost\Ubuntu\home\sam\stuff\BlazorServerTest1` In a terminal window on the Linux VM run the following: sam@UGLY:~/stuff/BlazorServerTest1$ chmod 777 BlazorServerTest1 sam@UGLY:~/stuff/BlazorServerTest1$ ./BlazorServerTest1 > Unhandled exception. SocketIOClient.ConnectionException: Cannot connect to server 'http://localhost/' > ---> System.TimeoutException: The operation has timed out. > --- End of inner exception stack trace --- > at SocketIOClient.SocketIO.ConnectAsync() > at ElectronNET.API.SocketIoFacade.Connect() > at ElectronNET.API.BridgeConnector.get_Socket() > at ElectronNET.API.WindowManager.CreateWindowAsync(BrowserWindowOptions options, String loadUrl) > at ElectronNET.API.WindowManager.CreateWindowAsync(String loadUrl) > at BlazorServerTest1.Program.ElectronBootstrap() in C:\Projects\BlazorServerTest1\BlazorServerTest1\Program.cs:line 80 > at BlazorServerTest1.Program.<>c__DisplayClass0_0.<<Main>b__0>d.MoveNext() in C:\Projects\BlazorServerTest1\BlazorServerTest1\Program.cs:line 36 > --- End of stack trace from previous location --- > at System.Threading.Tasks.Task.<>c.<ThrowAsync>b__128_1(Object state) > at System.Threading.QueueUserWorkItemCallbackDefaultContext.Execute() > at System.Threading.ThreadPoolWorkQueue.Dispatch() > at System.Threading.PortableThreadPool.WorkerThread.WorkerThreadStart() > at System.Threading.Thread.StartCallback() > Aborted Am I supposed to have a HTTP server runing on the Linux machine? Error message references files on my windows machine.... IDK why.
claunia commented 2026-01-29 16:51:13 +00:00
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@sam-wheat commented on GitHub (Apr 25, 2023):

In this issue it was requested to copy the project source to Ubunto and build. I did that - here is what I got:

sam@UGLY:~/stuff/BlazorServerTest1$ dotnet build

MSBuild version 17.3.2+561848881 for .NET
Determining projects to restore...
Restored /home/sam/stuff/BlazorServerTest1/BlazorServerTest1.csproj (in 458 ms).
BlazorServerTest1 -> /home/sam/stuff/BlazorServerTest1/bin/Debug/net6.0/BlazorServerTest1.dll

Build succeeded.
0 Warning(s)
0 Error(s)

Time Elapsed 00:00:03.73

sam@UGLY:~/stuff/BlazorServerTest1$ electronize start

Start Electron Desktop Application...
Arguments:

dotnet publish -r linux-x64 -c "Debug" --output "/home/sam/stuff/BlazorServerTest1/obj/Host/bin" /p:PublishReadyToRun=true /p:PublishSingleFile=true --no-self-contained
MSBuild version 17.3.2+561848881 for .NET
Determining projects to restore...
Restored /home/sam/stuff/BlazorServerTest1/BlazorServerTest1.csproj (in 473 ms).
BlazorServerTest1 -> /home/sam/stuff/BlazorServerTest1/bin/Debug/net6.0/linux-x64/BlazorServerTest1.dll
BlazorServerTest1 -> /home/sam/stuff/BlazorServerTest1/obj/Host/bin/

node_modules missing in: /home/sam/stuff/BlazorServerTest1/obj/Host/node_modules
Start npm install...
npm install
/usr/bin/env: ‘bash\r’: No such file or directory

ElectronHostHook handling started...
Invoke electron - in dir: /home/sam/stuff/BlazorServerTest1/obj/Host/node_modules/.bin
./electron "../../main.js"
Unhandled exception. System.AggregateException: One or more errors occurred. (An error occurred trying to start process '/usr/bin/bash' with working directory
'/home/sam/stuff/BlazorServerTest1/obj/Host/node_modules/.bin'. No such file or directory)
---> System.ComponentModel.Win32Exception (2): An error occurred trying to start process '/usr/bin/bash' with working directory '/home/sam/stuff/BlazorServerTest1/obj/Host/node_modules/.bin'. No
such file or directory
at System.Diagnostics.Process.ForkAndExecProcess(ProcessStartInfo startInfo, String resolvedFilename, String[] argv, String[] envp, String cwd, Boolean setCredentials, UInt32 userId, UInt32 groupId, UInt32[] groups, Int32& stdinFd, Int32& stdoutFd, Int32& stderrFd, Boolean usesTerminal, Boolean throwOnNoExec)
at System.Diagnostics.Process.StartCore(ProcessStartInfo startInfo)
at System.Diagnostics.Process.Start()
at ElectronNET.CLI.ProcessHelper.CmdExecute(String command, String workingDirectoryPath, Boolean output, Boolean waitForExit) in C:_PrivateRepo\Electron.NET\ElectronNET.CLI\ProcessHelper.cs:line 40
at ElectronNET.CLI.Commands.StartElectronCommand.b__17_0() in C:_PrivateRepo\Electron.NET\ElectronNET.CLI\Commands\StartElectronCommand.cs:line 178
at System.Threading.Tasks.Task1.InnerInvoke() at System.Threading.Tasks.Task.<>c.<.cctor>b__272_0(Object obj) at System.Threading.ExecutionContext.RunFromThreadPoolDispatchLoop(Thread threadPoolThread, ExecutionContext executionContext, ContextCallback callback, Object state) --- End of stack trace from previous location --- at System.Threading.ExecutionContext.RunFromThreadPoolDispatchLoop(Thread threadPoolThread, ExecutionContext executionContext, ContextCallback callback, Object state) at System.Threading.Tasks.Task.ExecuteWithThreadLocal(Task& currentTaskSlot, Thread threadPoolThread) --- End of inner exception stack trace --- at System.Threading.Tasks.Task.ThrowIfExceptional(Boolean includeTaskCanceledExceptions) at System.Threading.Tasks.Task1.GetResultCore(Boolean waitCompletionNotification)
at System.Threading.Tasks.Task`1.get_Result()
at ElectronNET.CLI.Program.Main(String[] args) in C:_PrivateRepo\Electron.NET\ElectronNET.CLI\Program.cs:line 59
Aborted

@sam-wheat commented on GitHub (Apr 25, 2023): In [this issue](https://github.com/ElectronNET/Electron.NET/issues/750) it was requested to copy the project source to Ubunto and build. I did that - here is what I got: sam@UGLY:~/stuff/BlazorServerTest1$ dotnet build > MSBuild version 17.3.2+561848881 for .NET > Determining projects to restore... > Restored /home/sam/stuff/BlazorServerTest1/BlazorServerTest1.csproj (in 458 ms). > BlazorServerTest1 -> /home/sam/stuff/BlazorServerTest1/bin/Debug/net6.0/BlazorServerTest1.dll > Build succeeded. > 0 Warning(s) > 0 Error(s) > Time Elapsed 00:00:03.73 sam@UGLY:~/stuff/BlazorServerTest1$ electronize start > Start Electron Desktop Application... > Arguments: > dotnet publish -r linux-x64 -c "Debug" --output "/home/sam/stuff/BlazorServerTest1/obj/Host/bin" /p:PublishReadyToRun=true /p:PublishSingleFile=true --no-self-contained > MSBuild version 17.3.2+561848881 for .NET > Determining projects to restore... > Restored /home/sam/stuff/BlazorServerTest1/BlazorServerTest1.csproj (in 473 ms). > BlazorServerTest1 -> /home/sam/stuff/BlazorServerTest1/bin/Debug/net6.0/linux-x64/BlazorServerTest1.dll > BlazorServerTest1 -> /home/sam/stuff/BlazorServerTest1/obj/Host/bin/ > node_modules missing in: /home/sam/stuff/BlazorServerTest1/obj/Host/node_modules > Start npm install... > npm install > /usr/bin/env: ‘bash\r’: No such file or directory > ElectronHostHook handling started... > Invoke electron - in dir: /home/sam/stuff/BlazorServerTest1/obj/Host/node_modules/.bin > ./electron "../../main.js" > Unhandled exception. System.AggregateException: One or more errors occurred. (An error occurred trying to start process '/usr/bin/bash' with working directory > '/home/sam/stuff/BlazorServerTest1/obj/Host/node_modules/.bin'. No such file or directory) > ---> System.ComponentModel.Win32Exception (2): An error occurred trying to start process '/usr/bin/bash' with working directory '/home/sam/stuff/BlazorServerTest1/obj/Host/node_modules/.bin'. No > such file or directory > at System.Diagnostics.Process.ForkAndExecProcess(ProcessStartInfo startInfo, String resolvedFilename, String[] argv, String[] envp, String cwd, Boolean setCredentials, UInt32 userId, UInt32 groupId, UInt32[] groups, Int32& stdinFd, Int32& stdoutFd, Int32& stderrFd, Boolean usesTerminal, Boolean throwOnNoExec) > at System.Diagnostics.Process.StartCore(ProcessStartInfo startInfo) > at System.Diagnostics.Process.Start() > at ElectronNET.CLI.ProcessHelper.CmdExecute(String command, String workingDirectoryPath, Boolean output, Boolean waitForExit) in C:\_PrivateRepo\Electron.NET\ElectronNET.CLI\ProcessHelper.cs:line 40 > at ElectronNET.CLI.Commands.StartElectronCommand.<ExecuteAsync>b__17_0() in C:\_PrivateRepo\Electron.NET\ElectronNET.CLI\Commands\StartElectronCommand.cs:line 178 > at System.Threading.Tasks.Task`1.InnerInvoke() > at System.Threading.Tasks.Task.<>c.<.cctor>b__272_0(Object obj) > at System.Threading.ExecutionContext.RunFromThreadPoolDispatchLoop(Thread threadPoolThread, ExecutionContext executionContext, ContextCallback callback, Object state) > --- End of stack trace from previous location --- > at System.Threading.ExecutionContext.RunFromThreadPoolDispatchLoop(Thread threadPoolThread, ExecutionContext executionContext, ContextCallback callback, Object state) > at System.Threading.Tasks.Task.ExecuteWithThreadLocal(Task& currentTaskSlot, Thread threadPoolThread) > --- End of inner exception stack trace --- > at System.Threading.Tasks.Task.ThrowIfExceptional(Boolean includeTaskCanceledExceptions) > at System.Threading.Tasks.Task`1.GetResultCore(Boolean waitCompletionNotification) > at System.Threading.Tasks.Task`1.get_Result() > at ElectronNET.CLI.Program.Main(String[] args) in C:\_PrivateRepo\Electron.NET\ElectronNET.CLI\Program.cs:line 59 > Aborted
claunia commented 2026-01-29 16:51:13 +00:00
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@sam-wheat commented on GitHub (Apr 25, 2023):

I fixed the npm error using the answer to this question.

Tried to run my app from source again at Ubunto terminal prompt:

sam@UGLY:~/stuff/BlazorServerTest1$ electronize start

Start Electron Desktop Application...
Arguments:

dotnet publish -r linux-x64 -c "Debug" --output "/home/sam/stuff/BlazorServerTest1/obj/Host/bin" /p:PublishReadyToRun=true /p:PublishSingleFile=true --no-self-contained
MSBuild version 17.3.2+561848881 for .NET
Determining projects to restore...
All projects are up-to-date for restore.
BlazorServerTest1 -> /home/sam/stuff/BlazorServerTest1/bin/Debug/net6.0/linux-x64/BlazorServerTest1.dll
BlazorServerTest1 -> /home/sam/stuff/BlazorServerTest1/obj/Host/bin/

node_modules missing in: /home/sam/stuff/BlazorServerTest1/obj/Host/node_modules
Start npm install...
npm install
npm WARN EBADENGINE Unsupported engine {
npm WARN EBADENGINE package: 'image-size@1.0.2',
npm WARN EBADENGINE required: { node: '>=14.0.0' },
npm WARN EBADENGINE current: { node: 'v12.22.9', npm: '8.5.1' }
npm WARN EBADENGINE }

up to date, audited 153 packages in 815ms

22 packages are looking for funding
run npm fund for details

found 0 vulnerabilities

ElectronHostHook handling started...
Invoke electron - in dir: /home/sam/stuff/BlazorServerTest1/obj/Host/node_modules/.bin
./electron "../../main.js"
Electron Socket IO Port: 8000
Electron Socket started on port 8000 at ::1
ASP.NET Core Port: 8001
[1185:0424/180630.352942:ERROR:viz_main_impl.cc(186)] Exiting GPU process due to errors during initialization
[1235:0424/180630.428464:ERROR:gpu_memory_buffer_support_x11.cc(49)] dri3 extension not supported.
stdout: Use Electron Port: 8000

ASP.NET Core Application connected... global.electronsocket vs057hfhE7d3iR9xAAAC 2023-04-25T01:06:30.707Z
stdout: BridgeConnector connected!

stdout: Called Event BrowserWindowCreated - data 1

(node:1158) electron: Failed to load URL: http://localhost:8001/ with error: ERR_CONNECTION_REFUSED
(Use electron --trace-warnings ... to show where the warning was created)
stdout: info: Microsoft.Hosting.Lifetime[14]
Now listening on: http://localhost:8001

stdout: ASP.NET Core host has fully started.

stdout: info: Microsoft.Hosting.Lifetime[0]
Application started. Press Ctrl+C to shut down.

stdout: info: Microsoft.Hosting.Lifetime[0]
Hosting environment: Production
info: Microsoft.Hosting.Lifetime[0]
Content root path: /home/sam/stuff/BlazorServerTest1/obj/Host/bin/

Electron can't find my app but when I go to http://localhost:8001/ in my browser my app loads immediately without error.

	"Kestrel": {
		"EndPoints": {
		  "Http": {
			"Url": "http://localhost:8001"
		  }
		}
@sam-wheat commented on GitHub (Apr 25, 2023): I fixed the npm error using the answer to [this question](https://stackoverflow.com/questions/67938486/after-installing-npm-on-wsl-ubuntu-20-04-i-get-the-message-usr-bin-env-bash). Tried to run my app from source again at Ubunto terminal prompt: sam@UGLY:~/stuff/BlazorServerTest1$ electronize start Start Electron Desktop Application... Arguments: dotnet publish -r linux-x64 -c "Debug" --output "/home/sam/stuff/BlazorServerTest1/obj/Host/bin" /p:PublishReadyToRun=true /p:PublishSingleFile=true --no-self-contained MSBuild version 17.3.2+561848881 for .NET Determining projects to restore... All projects are up-to-date for restore. BlazorServerTest1 -> /home/sam/stuff/BlazorServerTest1/bin/Debug/net6.0/linux-x64/BlazorServerTest1.dll BlazorServerTest1 -> /home/sam/stuff/BlazorServerTest1/obj/Host/bin/ node_modules missing in: /home/sam/stuff/BlazorServerTest1/obj/Host/node_modules Start npm install... npm install npm WARN EBADENGINE Unsupported engine { npm WARN EBADENGINE package: 'image-size@1.0.2', npm WARN EBADENGINE required: { node: '>=14.0.0' }, npm WARN EBADENGINE current: { node: 'v12.22.9', npm: '8.5.1' } npm WARN EBADENGINE } up to date, audited 153 packages in 815ms 22 packages are looking for funding run `npm fund` for details found 0 vulnerabilities ElectronHostHook handling started... Invoke electron - in dir: /home/sam/stuff/BlazorServerTest1/obj/Host/node_modules/.bin ./electron "../../main.js" Electron Socket IO Port: 8000 Electron Socket started on port 8000 at ::1 ASP.NET Core Port: 8001 [1185:0424/180630.352942:ERROR:viz_main_impl.cc(186)] Exiting GPU process due to errors during initialization [1235:0424/180630.428464:ERROR:gpu_memory_buffer_support_x11.cc(49)] dri3 extension not supported. stdout: Use Electron Port: 8000 ASP.NET Core Application connected... global.electronsocket vs057hfhE7d3iR9xAAAC 2023-04-25T01:06:30.707Z stdout: BridgeConnector connected! stdout: Called Event BrowserWindowCreated - data 1 (node:1158) electron: Failed to load URL: http://localhost:8001/ with error: ERR_CONNECTION_REFUSED (Use `electron --trace-warnings ...` to show where the warning was created) stdout: info: Microsoft.Hosting.Lifetime[14] Now listening on: http://localhost:8001 stdout: ASP.NET Core host has fully started. stdout: info: Microsoft.Hosting.Lifetime[0] Application started. Press Ctrl+C to shut down. stdout: info: Microsoft.Hosting.Lifetime[0] Hosting environment: Production info: Microsoft.Hosting.Lifetime[0] Content root path: /home/sam/stuff/BlazorServerTest1/obj/Host/bin/ Electron can't find my app but when I go to http://localhost:8001/ in my browser my app loads immediately without error. "Kestrel": { "EndPoints": { "Http": { "Url": "http://localhost:8001" } }
claunia commented 2026-01-29 16:51:13 +00:00
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@andrewschuler commented on GitHub (Apr 25, 2023):

I'm getting the exact same error on ubuntu with the demo api app. I just created an issue over there a few minutes ago before I saw this.

Frankly I've been working for several days to get ANY type of project to run or build on Linux with no success. If you figure this out PLEASE let me know.
I've tried creating various types of new dotnet projects, then "electronizing" them. They all work on Windows but none work on Linux. All with different types of errors. I was hoping to use Linux as a build server to target Mac but this is a bit dis-heartening.

This error seems to be related to the graphics driver? My ubuntu instance is a VM running in Hyper-V

@andrewschuler commented on GitHub (Apr 25, 2023): I'm getting the exact same error on ubuntu with the demo api app. I just created an issue over there a few minutes ago before I saw this. Frankly I've been working for several days to get ANY type of project to run or build on Linux with no success. If you figure this out PLEASE let me know. I've tried creating various types of new dotnet projects, then "electronizing" them. They all work on Windows but none work on Linux. All with different types of errors. I was hoping to use Linux as a build server to target Mac but this is a bit dis-heartening. This error seems to be related to the graphics driver? My ubuntu instance is a VM running in Hyper-V
claunia commented 2026-01-29 16:51:13 +00:00
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@sam-wheat commented on GitHub (Apr 25, 2023):

@andrewschuler Andrew, you may want to try Photiono. I had problems with it initially, but they released a new build in the last few days. I just got a basic hello world app running on both Windows and Ubunto.

@sam-wheat commented on GitHub (Apr 25, 2023): @andrewschuler Andrew, you may want to try [Photiono](https://github.com/tryphotino/photino.Blazor). I had problems with it initially, but they released a new build in the last few days. I just got a basic hello world app running on both Windows and Ubunto.
claunia commented 2026-01-29 16:51:14 +00:00
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@andrewschuler commented on GitHub (Apr 25, 2023):

@sam-wheat Thanks for that.

Some more information for you as well. All the errors I've been seeing have been with "electronize start". However I just tried to build the project with "electronize build /target linux" on Ubuntu. That builds successfully with the errors and the app runs as it should. From this experience it seems maybe 'electronize start' should only be used on Windows?

@andrewschuler commented on GitHub (Apr 25, 2023): @sam-wheat Thanks for that. Some more information for you as well. All the errors I've been seeing have been with "electronize start". However I just tried to build the project with "electronize build /target linux" on Ubuntu. That builds successfully with the errors and the app runs as it should. From this experience it seems maybe 'electronize start' should only be used on Windows?
claunia commented 2026-01-29 16:51:14 +00:00
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@sam-wheat commented on GitHub (Apr 25, 2023):

@andrewschuler I'm just another user so I can't offer any guidance. You made it further than I did however. I was never able to get it to run on linux even if I built it on the linux machine.

@sam-wheat commented on GitHub (Apr 25, 2023): @andrewschuler I'm just another user so I can't offer any guidance. You made it further than I did however. I was never able to get it to run on linux even if I built it on the linux machine.
claunia commented 2026-01-29 16:51:15 +00:00
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@andrewschuler commented on GitHub (Apr 25, 2023):

@andrewschuler I'm just another user so I can't offer any guidance. You made it further than I did however. I was never able to get it to run on linux even if I built it on the linux machine.

Trying building it with "electonize build /target linux". Then nagivate down to "bin/Desktop/linux-unpacked" and try to run the binary.

@andrewschuler commented on GitHub (Apr 25, 2023): > @andrewschuler I'm just another user so I can't offer any guidance. You made it further than I did however. I was never able to get it to run on linux even if I built it on the linux machine. Trying building it with "electonize build /target linux". Then nagivate down to "bin/Desktop/linux-unpacked" and try to run the binary.
claunia commented 2026-01-29 16:51:15 +00:00
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@LapinskasL commented on GitHub (Jun 27, 2024):

@andrewschuler and @sam-wheat, did any of you find a solution? I'm getting the SocketIOClient.ConnectionException: Cannot connect to server 'http://localhost/' error, but on Windows.

@LapinskasL commented on GitHub (Jun 27, 2024): @andrewschuler and @sam-wheat, did any of you find a solution? I'm getting the `SocketIOClient.ConnectionException: Cannot connect to server 'http://localhost/'` error, but on Windows.
claunia commented 2026-01-29 16:51:15 +00:00
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@sam-wheat commented on GitHub (Jun 27, 2024):

I ended up using a different platform and have not looked back. See my link to Photino above.

From: Lukas Lapinskas @.>
Sent: Thursday, June 27, 2024 8:06 AM
To: ElectronNET/Electron.NET @.>
Cc: Sam Wheat @.>; Mention @.>
Subject: Re: [ElectronNET/Electron.NET] ERR_ELECTRON_BUILDER_CANNOT_EXECUTE when trying to build a desktop app for Ubunto (Issue #770)

@andrewschulerhttps://github.com/andrewschuler and @sam-wheathttps://github.com/sam-wheat, did any of you find a solution? I'm getting the SocketIOClient.ConnectionException: Cannot connect to server 'http://localhost/' error, but on Windows.

—
Reply to this email directly, view it on GitHubhttps://github.com/ElectronNET/Electron.NET/issues/770#issuecomment-2194966984, or unsubscribehttps://github.com/notifications/unsubscribe-auth/AEA2LWQMYFXRBKD3Z6DWVZTZJQS5XAVCNFSM6AAAAABKAEDCQWVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZDCOJUHE3DMOJYGQ.
You are receiving this because you were mentioned.Message ID: @.***>

@sam-wheat commented on GitHub (Jun 27, 2024): I ended up using a different platform and have not looked back. See my link to Photino above. ________________________________ From: Lukas Lapinskas ***@***.***> Sent: Thursday, June 27, 2024 8:06 AM To: ElectronNET/Electron.NET ***@***.***> Cc: Sam Wheat ***@***.***>; Mention ***@***.***> Subject: Re: [ElectronNET/Electron.NET] ERR_ELECTRON_BUILDER_CANNOT_EXECUTE when trying to build a desktop app for Ubunto (Issue #770) @andrewschuler<https://github.com/andrewschuler> and @sam-wheat<https://github.com/sam-wheat>, did any of you find a solution? I'm getting the SocketIOClient.ConnectionException: Cannot connect to server 'http://localhost/' error, but on Windows. — Reply to this email directly, view it on GitHub<https://github.com/ElectronNET/Electron.NET/issues/770#issuecomment-2194966984>, or unsubscribe<https://github.com/notifications/unsubscribe-auth/AEA2LWQMYFXRBKD3Z6DWVZTZJQS5XAVCNFSM6AAAAABKAEDCQWVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZDCOJUHE3DMOJYGQ>. You are receiving this because you were mentioned.Message ID: ***@***.***>
claunia commented 2026-01-29 16:51:16 +00:00
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@andrewschuler commented on GitHub (Jun 27, 2024):

Same as @sam-wheat , I punted on Linux support and jumped over to MAUI.

@andrewschuler commented on GitHub (Jun 27, 2024): Same as @sam-wheat , I punted on Linux support and jumped over to MAUI.
claunia commented 2026-01-29 16:51:16 +00:00
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@noamyogev84 commented on GitHub (Jul 13, 2025):

Same error here.
Trying to electronize my NET7 application, with no success, not building nor with start command.
It gives me constantly:

stdout: SocketIOClient.ConnectionException: Cannot connect to server 'http://localhost/'
---> System.TimeoutException: The operation has timed out.
--- End of inner exception stack trace ---
at SocketIOClient.SocketIO.ConnectAsync()
at ElectronNET.API.SocketIoFacade.Connect()
at ElectronNET.API.BridgeConnector.get_Socket()
at ElectronNET.API.WindowManager.CreateWindowAsync(BrowserWindowOptions options, String loadUrl)

@noamyogev84 commented on GitHub (Jul 13, 2025): Same error here. Trying to electronize my NET7 application, with no success, not building nor with start command. It gives me constantly: stdout: SocketIOClient.ConnectionException: Cannot connect to server 'http://localhost/' ---> System.TimeoutException: The operation has timed out. --- End of inner exception stack trace --- at SocketIOClient.SocketIO.ConnectAsync() at ElectronNET.API.SocketIoFacade.Connect() at ElectronNET.API.BridgeConnector.get_Socket() at ElectronNET.API.WindowManager.CreateWindowAsync(BrowserWindowOptions options, String loadUrl)
claunia commented 2026-01-29 16:51:17 +00:00
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@FlorianRappl commented on GitHub (Nov 1, 2025):

Outdated - use ElectronNET.Core and ElectronNET.Core.AspNet.

See Wiki / What's New.

@FlorianRappl commented on GitHub (Nov 1, 2025): Outdated - use `ElectronNET.Core` and `ElectronNET.Core.AspNet`. See [Wiki / What's New](https://github.com/ElectronNET/Electron.NET/wiki/What's-New).
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