Another interresting error log:
[omnisharp-stdout-stream-consumer-22620] DEBUG org.sonarsource.sonarlint.omnisharp.protocol.OmnisharpResponseProcessor - Omnisharp: [DEBUG] MSBuild instance .NET Core SDK 10.0.301 18.6.4 scored at -2147483648
[omnisharp-stdout-stream-consumer-22620] DEBUG org.sonarsource.sonarlint.omnisharp.protocol.OmnisharpResponseProcessor - Omnisharp: [DEBUG] MSBuild instance .NET Core SDK 10.0.204 18.3.3 scored at -2147483648
[omnisharp-stdout-stream-consumer-22620] DEBUG org.sonarsource.sonarlint.omnisharp.protocol.OmnisharpResponseProcessor - Omnisharp: [DEBUG] MSBuild instance .NET Core SDK 10.0.109 18.0.11 scored at -2147483648
[omnisharp-stdout-stream-consumer-22620] DEBUG org.sonarsource.sonarlint.omnisharp.protocol.OmnisharpResponseProcessor - Omnisharp: [DEBUG] MSBuild instance .NET Core SDK 9.0.315 17.14.43 scored at -2147483648
[omnisharp-stdout-stream-consumer-22620] DEBUG org.sonarsource.sonarlint.omnisharp.protocol.OmnisharpResponseProcessor - Omnisharp: [DEBUG] MSBuild instance .NET Core SDK 9.0.205 17.13.25 scored at -2147483648
[omnisharp-stdout-stream-consumer-22620] DEBUG org.sonarsource.sonarlint.omnisharp.protocol.OmnisharpResponseProcessor - Omnisharp: [DEBUG] MSBuild instance .NET Core SDK 9.0.118 17.12.57 scored at -2147483648
[omnisharp-stdout-stream-consumer-22620] DEBUG org.sonarsource.sonarlint.omnisharp.protocol.OmnisharpResponseProcessor - Omnisharp: [DEBUG] MSBuild instance .NET Core SDK 8.0.422 17.11.48 scored at -2147483648
[omnisharp-stdout-stream-consumer-22620] DEBUG org.sonarsource.sonarlint.omnisharp.protocol.OmnisharpResponseProcessor - Omnisharp: [INFORMATION] Registered MSBuild instance: .NET Core SDK 10.0.301 18.6.4 - "C:\\Program Files\\dotnet\\sdk\\10.0.301"
[omnisharp-stdout-stream-consumer-22620] DEBUG org.sonarsource.sonarlint.omnisharp.protocol.OmnisharpResponseProcessor - Omnisharp: [DEBUG] Starting with OmniSharp options: {"RoslynExtensionsOptions":{"EnableDecompilationSupport":false,"EnableAnalyzersSupport":false,"EnableImportCompletion":false,"EnableAsyncCompletion":false,"DocumentAnalysisTimeoutMs":30000,"DiagnosticWorkersThreadCount":15,"AnalyzeOpenDocumentsOnly":false,"InlayHintsOptions":{"EnableForParameters":false,"ForLiteralParameters":false,"ForIndexerParameters":false,"ForObjectCreationParameters":false,"ForOtherParameters":false,"SuppressForParametersThatDifferOnlyBySuffix":false,"SuppressForParametersThatMatchMethodIntent":false,"SuppressForParametersThatMatchArgumentName":false,"EnableForTypes":false,"ForImplicitVariableTypes":false,"ForLambdaParameterTypes":false,"ForImplicitObjectCreation":false},"LocationPaths":null},"FormattingOptions":{"OrganizeImports":false,"EnableEditorConfigSupport":false,"NewLine":"\\n","UseTabs":false,"TabSize":4,"IndentationSize":4,"SpacingAfterMethodDeclarationName":false,"SeparateImportDirectiveGroups":false,"SpaceWithinMethodDeclarationParenthesis":false,"SpaceBetweenEmptyMethodDeclarationParentheses":false,"SpaceAfterMethodCallName":false,"SpaceWithinMethodCallParentheses":false,"SpaceBetweenEmptyMethodCallParentheses":false,"SpaceAfterControlFlowStatementKeyword":true,"SpaceWithinExpressionParentheses":false,"SpaceWithinCastParentheses":false,"SpaceWithinOtherParentheses":false,"SpaceAfterCast":false,"SpaceBeforeOpenSquareBracket":false,"SpaceBetweenEmptySquareBrackets":false,"SpaceWithinSquareBrackets":false,"SpaceAfterColonInBaseTypeDeclaration":true,"SpaceAfterComma":true,"SpaceAfterDot":false,"SpaceAfterSemicolonsInForStatement":true,"SpaceBeforeColonInBaseTypeDeclaration":true,"SpaceBeforeComma":false,"SpaceBeforeDot":false,"SpaceBeforeSemicolonsInForStatement":false,"SpacingAroundBinaryOperator":"single","IndentBraces":false,"IndentBlock":true,"IndentSwitchSection":true,"IndentSwitchCaseSection":true,"IndentSwitchCaseSectionWhenBlock":true,"LabelPositioning":"oneLess","WrappingPreserveSingleLine":true,"WrappingKeepStatementsOnSingleLine":true,"NewLinesForBracesInTypes":true,"NewLinesForBracesInMethods":true,"NewLinesForBracesInProperties":true,"NewLinesForBracesInAccessors":true,"NewLinesForBracesInAnonymousMethods":true,"NewLinesForBracesInControlBlocks":true,"NewLinesForBracesInAnonymousTypes":true,"NewLinesForBracesInObjectCollectionArrayInitializers":true,"NewLinesForBracesInLambdaExpressionBody":true,"NewLineForElse":true,"NewLineForCatch":true,"NewLineForFinally":true,"NewLineForMembersInObjectInit":true,"NewLineForMembersInAnonymousTypes":true,"NewLineForClausesInQuery":true},"FileOptions":{"SystemExcludeSearchPatterns":\["**/node_modules/**/*","**/bin/**/*","**/obj/**/*","**/.git/**/*"\],"ExcludeSearchPatterns":[ ]},"RenameOptions":{"RenameOverloads":false,"RenameInStrings":false,"RenameInComments":false},"ImplementTypeOptions":{"InsertionBehavior":0,"PropertyGenerationBehavior":0},"DotNetCliOptions":{"LocationPaths":null},"Plugins":{"LocationPaths":null}}
[omnisharp-stdout-stream-consumer-22620] DEBUG org.sonarsource.sonarlint.omnisharp.protocol.OmnisharpResponseProcessor - Omnisharp: [INFORMATION] Invoking Workspace Options Provider: OmniSharp.Roslyn.CSharp.Services.CSharpFormattingWorkspaceOptionsProvider, Order: 0
[omnisharp-stdout-stream-consumer-22620] DEBUG org.sonarsource.sonarlint.omnisharp.protocol.OmnisharpResponseProcessor - Omnisharp: [INFORMATION] Updating the solution's fallback AnalyzerConfigOptions.
[omnisharp-stdout-stream-consumer-22620] DEBUG org.sonarsource.sonarlint.omnisharp.protocol.OmnisharpResponseProcessor - Omnisharp: [INFORMATION] Detecting Cake files in 'C:\\Projects\\TestProject'.
[omnisharp-stdout-stream-consumer-22620] DEBUG org.sonarsource.sonarlint.omnisharp.protocol.OmnisharpResponseProcessor - Omnisharp: [INFORMATION] Did not find any Cake files
[omnisharp-stdout-stream-consumer-22620] DEBUG org.sonarsource.sonarlint.omnisharp.protocol.OmnisharpResponseProcessor - Omnisharp: [ERROR] The project system 'OmniSharp.MSBuild.ProjectSystem' threw exception during initialization.
System.NullReferenceException: Object reference not set to an instance of an object.
at OmniSharp.MSBuild.MSBuildHelpers.GetBuildEnvironmentInfo() in C:\\a\\omnisharp-roslyn\\omnisharp-roslyn\\src\\OmniSharp.MSBuild\\MSBuildHelpers.cs:line 27
at OmniSharp.MSBuild.ProjectSystem.Initalize(IConfiguration configuration) in C:\\a\\omnisharp-roslyn\\omnisharp-roslyn\\src\\OmniSharp.MSBuild\\ProjectSystem.cs:line 101
at OmniSharp.WorkspaceInitializer.Initialize(IServiceProvider serviceProvider, CompositionHost compositionHost) in C:\\a\\omnisharp-roslyn\\omnisharp-roslyn\\src\\OmniSharp.Host\\WorkspaceInitializer.cs:line 58