Error message: "filetypes" of language server should be array of string

[miquecg]

Hi,

I've been recently seeing this error message first time I open up vim with an Erlang file:

[coc.nvim] "filetypes" field of language server Erlang should be array of string

This only happens once and doesn't affect my everyday use of the Erlang LS, but it's highlighted as an Error on red color below the status line.

$HOME/.vim/coc-settings.json

{
  "coc.preferences.formatOnSaveFiletypes": [
    "elixir",
    "erlang",
    "gleam"
  ],
  "codeLens.enable": true,
  "elixirLS.dialyzerEnabled": false,
  "languageserver": {
    "erlang": {
      "command": "erlang_ls",
      "filetypes": ["erlang"]
    },
    "gleam": {
      "command": "gleam",
      "args": ["lsp"],
      "filetypes": ["gleam"],
      "rootPatterns": ["gleam.toml", ".git"]
    }
  }
}

project specific settings

{
  "coc.preferences.formatOnSaveFiletypes": [],
  "languageserver.erlang.command": "~/.erlang_ls/release/25.1.1/bin/erlang_ls"
}

[chemzqm]

Configuration for each language server can't be merged, you should use

"languageserver": {
    "erlang": {
      "command": "~/.erlang_ls/release/25.1.1/bin/erlang_ls",
      "filetypes": ["erlang"]
    },
}

in your project settings instead.

[miquecg]

Thanks!