Dafny LanguageServer collapses

[h-chal]

This has happened multiple times, with no apparent cause since it happens as I am modifying code. It has happened with automatic verification onchange and onsave.

Note that I have redacted the path when copying the error message to here, but it is to a different .dfy file in the same folder as the file I was working on.

[Error - 12:23:00 PM] Request textDocument/codeAction failed.
Message: Internal Error - System.UnauthorizedAccessException: Access to the path [redacted] is denied.
at Microsoft.Win32.SafeHandles.SafeFileHandle.CreateFile(String fullPath, FileMode mode, FileAccess access, FileShare share, FileOptions options)
at Microsoft.Win32.SafeHandles.SafeFileHandle.Open(String fullPath, FileMode mode, FileAccess access, FileShare share, FileOptions options, Int64 preallocationSize)
at System.IO.Strategies.OSFileStreamStrategy..ctor(String path, FileMode mode, FileAccess access, FileShare share, FileOptions options, Int64 preallocationSize)
at Microsoft.Dafny.LanguageServer.Workspace.LanguageServerFilesystem.ReadFile(Uri uri)
at Microsoft.Dafny.ProgramParser.IncludeToDafnyFile(SystemModuleManager systemModuleManager, ErrorReporter errorReporter, Include include)
at Microsoft.Dafny.ProgramParser.TryParseIncludes(IReadOnlyList1 files, IEnumerable1 roots, SystemModuleManager systemModuleManager, ErrorReporter errorReporter, CancellationToken cancellationToken)
at Microsoft.Dafny.ProgramParser.ParseFiles(String programName, IReadOnlyList1 files, ErrorReporter errorReporter, CancellationToken cancellationToken) at Microsoft.Dafny.LanguageServer.Language.DafnyLangParser.Parse(TextDocumentIdentifier document, ErrorReporter reporter, CancellationToken cancellationToken) at Microsoft.Dafny.LanguageServer.Workspace.TextDocumentLoader.LoadInternal(DafnyOptions options, VersionedTextDocumentIdentifier documentIdentifier, CancellationToken cancellationToken) at Microsoft.Dafny.LanguageServer.Workspace.TextDocumentLoader.<>c__DisplayClass9_0.<<LoadAsync>b__0>d.MoveNext() --- End of stack trace from previous location --- at Microsoft.Dafny.LanguageServer.Workspace.TextDocumentLoader.LoadAsync(DafnyOptions options, VersionedTextDocumentIdentifier documentIdentifier, CancellationToken cancellationToken) at Microsoft.Dafny.LanguageServer.Workspace.CompilationManager.ResolveAsync() at Microsoft.Dafny.LanguageServer.Workspace.ProjectManager.GetLastDocumentAsync() at Microsoft.Dafny.LanguageServer.Handlers.DafnyCodeActionHandler.Handle(CodeActionParams request, CancellationToken cancellationToken) at OmniSharp.Extensions.LanguageServer.Server.Pipelines.SemanticTokensDeltaPipeline2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate1 next) at OmniSharp.Extensions.LanguageServer.Server.Pipelines.ResolveCommandPipeline2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate1 next) at MediatR.Pipeline.RequestPreProcessorBehavior2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate1 next) at MediatR.Pipeline.RequestPostProcessorBehavior2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate1 next) at MediatR.Pipeline.RequestExceptionProcessorBehavior2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate1 next) at MediatR.Pipeline.RequestExceptionProcessorBehavior2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate1 next) at MediatR.Pipeline.RequestExceptionActionProcessorBehavior2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate1 next) at MediatR.Pipeline.RequestExceptionActionProcessorBehavior2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate1 next) at OmniSharp.Extensions.JsonRpc.RequestRouterBase1.g__InnerRoute|7_0(IServiceScopeFactory serviceScopeFactory, Request request, TDescriptor descriptor, Object params, CancellationToken token, ILogger logger)
at OmniSharp.Extensions.JsonRpc.RequestRouterBase1.RouteRequest(IRequestDescriptor1 descriptors, Request request, CancellationToken token)
at OmniSharp.Extensions.JsonRpc.DefaultRequestInvoker.<>c__DisplayClass10_0.<b__5>d.MoveNext()
Code: -32603

[h-chal]

A new error message:
This occurred while I was typing and had automatic verification as onsave.

[Error - 2:29:38 PM] Request textDocument/completion failed.
Message: Internal Error - System.NullReferenceException: Object reference not set to an instance of an object.
at Microsoft.Dafny.Field.get_Children()
at Microsoft.Dafny.NodeExtensions.FindNode(INode node, DafnyPosition position)
at Microsoft.Dafny.NodeExtensions.FindNode(INode node, DafnyPosition position)
at Microsoft.Dafny.NodeExtensions.FindNode(INode node, Uri uri, DafnyPosition position)
at Microsoft.Dafny.NodeExtensions.FindNode(INode node, Uri uri, DafnyPosition position)
at Microsoft.Dafny.NodeExtensions.FindNode(INode node, Uri uri, DafnyPosition position)
at Microsoft.Dafny.LanguageServer.Handlers.DafnyCompletionHandler.CompletionProcessor.IsDotExpression()
at Microsoft.Dafny.LanguageServer.Handlers.DafnyCompletionHandler.CompletionProcessor.Process()
at Microsoft.Dafny.LanguageServer.Handlers.DafnyCompletionHandler.Handle(CompletionParams request, CancellationToken cancellationToken)
at OmniSharp.Extensions.LanguageServer.Server.Pipelines.SemanticTokensDeltaPipeline2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate1 next)
at OmniSharp.Extensions.LanguageServer.Server.Pipelines.ResolveCommandPipeline2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate1 next)
at MediatR.Pipeline.RequestPreProcessorBehavior2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate1 next)
at MediatR.Pipeline.RequestPostProcessorBehavior2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate1 next)
at MediatR.Pipeline.RequestExceptionProcessorBehavior2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate1 next)
at MediatR.Pipeline.RequestExceptionProcessorBehavior2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate1 next)
at MediatR.Pipeline.RequestExceptionActionProcessorBehavior2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate1 next)
at MediatR.Pipeline.RequestExceptionActionProcessorBehavior2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate1 next)
at OmniSharp.Extensions.JsonRpc.RequestRouterBase1.<RouteRequest>g__InnerRoute|7_0(IServiceScopeFactory serviceScopeFactory, Request request, TDescriptor descriptor, Object params, CancellationToken token, ILogger logger) at OmniSharp.Extensions.JsonRpc.RequestRouterBase1.RouteRequest(IRequestDescriptor`1 descriptors, Request request, CancellationToken token)
at OmniSharp.Extensions.JsonRpc.DefaultRequestInvoker.<>c__DisplayClass10_0.<b__5>d.MoveNext()
Code: -32603