Errors are reported in an untitled CSS file in VS Code

[mizdra]

How to reproduce

1. Open https://github.com/mizdra/css-modules-kit/tree/13a3fa76718de16608bb0d072830deb8270fc061 in VS Code
2. Select vscode (1-basic) in Run and Debug menu
3. Wait to open new VS Code window
4. Create new text file in Command+N
5. Write any css code in the text file
6. Select F1 > Change Language Mode > CSS

Screenshot

[mizdra]

This issue is blocked by volarjs/volar.js#286.