coc-svelte not working, Cannot read properties of undefined (reading 'debug')

[sleep2death]

vim version: NVIM v0.7.2
node version: v18.9.0
coc.nvim version: 0.0.82-488d6ae7 2022-09-22 01:50:53 +0800
coc.nvim directory: /Users/aspirin2d/.local/share/nvim/plugged/coc.nvim
term: iTerm.app
platform: darwin

Log of coc.nvim

2022-09-22T23:12:02.827 INFO (pid:12804) [plugin] - coc.nvim initialized with node: v18.9.0 after 23ms
2022-09-22T23:12:10.300 INFO (pid:12804) [attach] - receive notification: showInfo []
2022-09-22T23:13:07.993 ERROR (pid:12804) [language-client-client] - Server svelte initialization failed. Xm [Error]: Request initialize failed with message: Cannot read properties of undefined (reading 'debug')
at Fe (/Users/aspirin2d/.local/share/nvim/plugged/coc.nvim/build/index.js:25:233)
at Ni (/Users/aspirin2d/.local/share/nvim/plugged/coc.nvim/build/index.js:24:6872)
at Immediate. (/Users/aspirin2d/.local/share/nvim/plugged/coc.nvim/build/index.js:24:6719)
at process.processImmediate (node:internal/timers:471:21) {
code: -32603,
data: undefined
}

vim :check health

coc: health#coc#check

• OK: nvim version satisfied
• OK: Environment check passed
• WARNING: pyx command not work, some extensions may fail to work, checkout ":help pythonx"
• WARNING: Install pynvim by command: pip install pynvim --upgrade
• OK: Javascript bundle build/index.js found
• OK: Service started

nvim: health#nvim#check

Configuration

• OK: no issues found

Performance

• OK: Build type: Release

Remote Plugins

• OK: Up to date

terminal

• INFO: key_backspace (kbs) terminfo entry: key_backspace=^H
• INFO: key_dc (kdch1) terminfo entry: key_dc=\E[3~
• INFO: $TERM_PROGRAM='iTerm.app'
• INFO: $COLORTERM='truecolor'

provider: health#provider#check

Clipboard (optional)

• OK: Clipboard tool found: pbcopy

Python 3 provider (optional)

• WARNING: No Python executable found that can import neovim. Using the first available executable for diagnostics.
• WARNING: Could not load Python 3:
  /usr/bin/python3 does not have the "neovim" module.
  python3.10 not found in search path or not executable.
  python3.9 not found in search path or not executable.
  python3.8 not found in search path or not executable.
  python3.7 not found in search path or not executable.
  python not found in search path or not executable.
  • ADVICE:
    • See :help provider-python for more information.
    • You may disable this provider (and warning) by adding let g:loaded_python3_provider = 0 to your init.vim
• INFO: Executable: Not found

Python virtualenv

• OK: no $VIRTUAL_ENV

[sparkcanon]

I was about to make the same report. I have the same issue on vim 9.0.520

[3ximus]

I had a similar issue

Cannot read properties of undefined (reading 'warnings') (svelte)

It comes from using svelte 5. The dependencies of this plugin don't support it yet I believe.
There's currently a PR to solve the issue:
#69