C# Language service errors

Where does the bug appear (feature/product)?

Cursor IDE

Describe the Bug

Getting these popups after updating today. When I restart the IDE, they might not appear immediately, but later. The output is talking something about already open files.

Steps to Reproduce

Update to version 2.0.43 and start working with a C# project?

Screenshots / Screen Recordings

Operating System

Windows 10/11

Current Cursor Version (Menu → About Cursor → Copy)

Version: 2.0.43 (system setup)
VSCode Version: 1.99.3
Commit: 8e4da76ad196925accaa169efcae28c45454cce0
Date: 2025-10-30T18:49:27.589Z
Electron: 34.5.8
Chromium: 132.0.6834.210
Node.js: 20.19.1
V8: 13.2.152.41-electron.0
OS: Windows_NT x64 10.0.26200

Additional Information

I don’t know how serious this is. The IDE is still running and I can still chat with AI.

Does this stop you from using Cursor

Sometimes - I can sometimes use Cursor

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