OmniSharp: Could not load file or assembly System.Threading.Tasks.Dataflow, Version=4.6.3.0

Please help me out, I'm ripping out my hair over here. I start up VS Code and I get this. What is going on? I just want to get my work done.

I tried looking it up but I don't understand anything, it was working fine some days ago.

I have no other extensions installed, just .NET 5.0.103 and Unity.

The project system 'OmniSharp.MSBuild.ProjectSystem' threw exception during initialization. System.BadImageFormatException: Could not load file or assembly 'System.Threading.Tasks.Dataflow, Version=4.6.3.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' or one of its dependencies. The file or directory is corrupted and unreadable. (Exception from HRESULT: 0x80070570) File name: 'System.Threading.Tasks.Dataflow, Version=4.6.3.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' at OmniSharp.MSBuild.ProjectManager..ctor(ILoggerFactory loggerFactory, MSBuildOptions options, IEventEmitter eventEmitter, IFileSystemWatcher fileSystemWatcher, MetadataFileReferenceCache metadataFileReferenceCache, PackageDependencyChecker packageDependencyChecker, ProjectLoader projectLoader, OmniSharpWorkspace workspace, IAnalyzerAssemblyLoader analyzerAssemblyLoader, ImmutableArray 1 eventSinks, DotNetInfo dotNetInfo) at OmniSharp.MSBuild.ProjectSystem.Initalize(IConfiguration configuration) in D:\a\1\s\src\OmniSharp.MSBuild\ProjectSystem.cs:line 108 at OmniSharp.WorkspaceInitializer.Initialize(IServiceProvider serviceProvider, CompositionHost compositionHost) in D:\a\1\s\src\OmniSharp.Host\WorkspaceInitializer.cs:line 54

Unhandled Exception: System.NullReferenceException: Object reference not set to an instance of an object. at OmniSharp.MSBuild.ProjectManager.DisposeCore(Boolean disposing) in D:\a\1\s\src\OmniSharp.MSBuild\ProjectManager.cs:line 156 at OmniSharp.Utilities.DisposableObject.Finalize() in D:\a\1\s\src\OmniSharp.Shared\Utilities\DisposableObject.cs:line 13

Thanks!

Eh, whatever. Reinstalled everything according to https://code.visualstudio.com/docs/other/unity for the third time this month.