Unable to select project: "Cannot use API proposal: quickPickSeparators."

[2021-12-23 08:26:10.592] [exthost] [error] Error: Extension 'ms-dotnettools.csharp' CANNOT use API proposal: quickPickSeparators.
Its package.json#enabledApiProposals-property declares: [] but NOT quickPickSeparators.
 The missing proposal MUST be added and you must start in extension development mode or use the following command line switch: --enable-proposed-api ms-dotnettools.csharp
    at E (/usr/share/code/resources/app/out/vs/workbench/services/extensions/node/extensionHostProcess.js:93:80833)
    at Object.showQuickPick (/usr/share/code/resources/app/out/vs/workbench/services/extensions/node/extensionHostProcess.js:104:30178)
    at /home/vera/.vscode/extensions/ms-dotnettools.csharp-1.23.17/dist/extension.js:2:592598
    at Generator.next (<anonymous>:null:null)
    at /home/vera/.vscode/extensions/ms-dotnettools.csharp-1.23.17/dist/extension.js:2:592089
    at new Promise (<anonymous>:null:null)
    at r (/home/vera/.vscode/extensions/ms-dotnettools.csharp-1.23.17/dist/extension.js:2:591834)
    at b (/home/vera/.vscode/extensions/ms-dotnettools.csharp-1.23.17/dist/extension.js:2:592548)
    at /home/vera/.vscode/extensions/ms-dotnettools.csharp-1.23.17/dist/extension.js:2:594111
    at Generator.next (<anonymous>:null:null)
    at /home/vera/.vscode/extensions/ms-dotnettools.csharp-1.23.17/dist/extension.js:2:592089
    at new Promise (<anonymous>:null:null)
    at r (/home/vera/.vscode/extensions/ms-dotnettools.csharp-1.23.17/dist/extension.js:2:591834)
    at /home/vera/.vscode/extensions/ms-dotnettools.csharp-1.23.17/dist/extension.js:2:593977
    at runMicrotasks (<anonymous>:null:null)
    at processTicksAndRejections (internal/process/task_queues.js:93:5)
    at r._executeContributedCommand (/usr/share/code/resources/app/out/vs/workbench/services/extensions/node/extensionHostProcess.js:95:31072)
 o.pickProjectAndStart {"value":"ms-dotnettools.csharp","_lower":"ms-dotnettools.csharp"}

Issue Description

Steps to Reproduce

Expected Behavior

Actual Behavior

Logs

OmniSharp log

Post the output from Output-->OmniSharp log here

C# log

Post the output from Output-->C# here

Environment information

VSCode version: 1.63.0 C# Extension: 1.23.17

Mono Information

OmniSharp using built-in mono

Dotnet Information

SDK do .NET (refletindo qualquer global.json): Version: 6.0.101 Commit: ef49f6213a

Ambiente de runtime: OS Name: ubuntu OS Version: 18.04 OS Platform: Linux RID: ubuntu.18.04-x64 Base Path: /usr/local/share/dotnet/sdk/6.0.101/

Host (useful for support): Version: 6.0.1 Commit: 3a25a7f1cc

.NET SDKs installed: 6.0.101 [/usr/local/share/dotnet/sdk]

.NET runtimes installed: Microsoft.AspNetCore.App 6.0.1 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.App] Microsoft.NETCore.App 6.0.1 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App]

To install additional .NET runtimes or SDKs: https://aka.ms/dotnet-download

Visual Studio Code Extensions

Extension	Author	Version
aspnetcorerazor-html-css-class-completion	kevin-chatham	1.0.3
better-cpp-syntax	jeff-hykin	1.15.10
bisqwit-terminal-theme	yegiyan	1.0.0
cmake	twxs	0.0.17
cmake-tools	ms-vscode	1.9.2
cpp-helper	amiralizadeh9480	0.3.0
CppSnippets	hars	0.0.15
cpptools	ms-vscode	1.7.1
cpptools-extension-pack	ms-vscode	1.1.0
cpptools-themes	ms-vscode	1.0.0
csharp	ms-dotnettools	1.23.17
csharpextensions	jchannon	1.3.1
dark-plus-syntax	dunstontc	0.0.170
doxdocgen	cschlosser	1.3.2
EditorConfig	EditorConfig	0.16.4
go	golang	0.30.0
hexeditor	ms-vscode	1.8.2
html-css-class-completion	Zignd	1.20.0
html-preview-vscode	tht13	0.2.5
html-snippets	abusaidm	0.2.1
java	redhat	1.2.0
live-server	ms-vscode	0.2.11
LiveServer	ritwickdey	5.6.1
markdown-preview-github-styles	bierner	0.2.0
msbuild-project-tools	tintoy	0.4.3
powershell	ms-vscode	2021.12.0
remote-containers	ms-vscode-remote	0.209.6
remote-ssh	ms-vscode-remote	0.70.0
remote-ssh-edit	ms-vscode-remote	0.70.0
remote-wsl	ms-vscode-remote	0.63.13
vs-keybindings	ms-vscode	0.2.1
vscode-antlr4	mike-lischke	2.2.4
vscode-base64	adamhartford	0.1.0
vscode-commons	redhat	0.0.6
vscode-css-formatter	aeschli	1.0.2
vscode-decompiler	tintinweb	0.0.8
vscode-gradle	vscjava	3.9.0
vscode-html-css	ecmel	1.10.2
vscode-implicit-indent	jemc	1.1.1
vscode-java-debug	vscjava	0.37.0
vscode-java-dependency	vscjava	0.18.9
vscode-java-pack	vscjava	0.20.0
vscode-java-test	vscjava	0.33.1
vscode-maven	vscjava	0.34.2
vscode-nuget-gallery	patcx	0.0.24
vscode-solution-explorer	fernandoescolar	0.4.4
vscode-typescript-next	ms-vscode	4.6.20211222
vscode-wakatime	WakaTime	17.1.0
vscode-xml	redhat	0.18.2
vscodeintellicode	VisualStudioExptTeam	1.2.15
xml	DotJoshJohnson	2.5.1
xml-format	mikeburgh	1.1.2

[majew7]

For me the bug also appears fixed on my Mac with C# extension beta version 1.24.0, which I manually installed into VS Code with this Guide: Installing Beta Releases.

Version 1.24.0 doesn’t appear available in the VS Code Extension Marketplace yet (https://marketplace.visualstudio.com/items?itemName=ms-dotnettools.csharp)

[dimitritholen]

I’m experiencing the same issue. Installing 1.24.0-Beta fixed the issue for me.