Could not find language server executable to spawn.

[raffaeleterribile]

Hi.

I've developed a Q# application, but I have an error everytime I open the solution. I see messages about downloading on the Q# Language Server and I always get this error:

[Error - 23:18:56] Starting client failed Error: Could not find language server executable to spawn. at LanguageServer. (.vscode\extensions\quantum.quantum-devkit-vscode-0.21.2112180703\out\languageServer.js:283:27) at Generator.next () at fulfilled (.vscode\extensions\quantum.quantum-devkit-vscode-0.21.2112180703\out\languageServer.js:7:58)

I have uninstalled and reinstalled Microsoft Quantum Development Kit several times.

Opening the solution with Visual Studio 2019, I get this error:

System.InvalidOperationException: No process is associated with this object. at System.Diagnostics.Process.EnsureState(State state) at System.Diagnostics.Process.get_HasExited() at Microsoft.Quantum.QsCompiler.ProcessRunner.Run(String command, String args, StringBuilder& outstream, StringBuilder& errstream, Int32& exitCode, Exception& ex, IDictionary`2 envVariables, Int32 timeout, Int32 exitCodeOnTimeOut) at Microsoft.Quantum.QsCompiler.CompilationBuilder.CompilationUnitManager.<>c__DisplayClass46_0.<Formatting>g__FormatFile|0(FileContentManager file) at Microsoft.Quantum.QsCompiler.CompilationBuilder.CompilationUnitManager.<>c__DisplayClass46_0.<Formatting>b__2(FileContentManager file, CompilationUnit _) at Microsoft.Quantum.QsCompiler.CompilationBuilder.CompilationUnitManager.<FileQuery>g__TryQueryFile|47_0[T](FileContentManager f, <>c__DisplayClass47_0`1& )

[bettinaheim]

@raffaeleterribile Could you please quickly double check if you have configured a custom path for the language server in the extension setting? In the VS Code menu, go to File/Code -> Preferences -> Settings, scroll down to Extensions -> Q# Language Server Configuration and click on Edit in settings.json. Does that file contain a key "quantumDevKit.languageServerPath"? If it doesn't could you please let us know the operating system and extension version you are working with?

@ricardo-espinoza @cgranade For further follow up.

[raffaeleterribile]

Sorry, I didn't notice your response... I've checked the custom path and tried both to leave it as an empty string and to point to the effective language server path.