Request textDocument/documentSymbol failed with message: Cannot set property createLanguageServiceSourceFile of #<Object> which has only a getter

[alexcroox]

• I have searched through existing issues
• I have read through docs
• I have read FAQ
• I have tried restarting VS Code or running Vetur: Restart VLS

Info

• Platform: macOS
• Vetur version: 0.37.3
• VS Code version: Version: 1.79.2 (Universal)
• TypeScript version:
• Vetur output:

<!-- Run VSCode command `Vetur: Show output panel` -->

- Vetur doctor output

Doctor output

Vetur initialized
[INFO ] Find node_modules paths in /Users/alex/Projects/exchange - 295ms
[INFO ] Loaded typescript@5.1.3 from /Users/alex/Projects/exchange/node_modules/typescript.
[INFO ] Loaded prettier@2.8.7 from /Users/alex/Projects/exchange/node_modules/prettier.
[INFO ] Loaded bundled @starptech/prettyhtml.
[INFO ] Loaded bundled prettier-eslint.
[INFO ] Loaded bundled prettier-tslint.
[INFO ] Loaded bundled stylus-supremacy.
[INFO ] Loaded bundled @prettier/plugin-pug.
[Error - 08:53:12] Request textDocument/documentSymbol failed.
  Message: Request textDocument/documentSymbol failed with message: Cannot set property createLanguageServiceSourceFile of #<Object> which has only a getter
  Code: -32603 

Problem

Not sure if it's a recent version of VSCode but saving .vue (2) files hangs forever trying to format them and I see the above error in the output of Vue Language Server panel. No amount of restarting has resolved it.

It also seems to be forever trying to load the project

[farfromrefug]

@alexcroox for me it was because i was using typescript 5.x which does not seem to be compatible with vetur

[haradhansharma]

npm install typescript --save-dev solved in my case