Calls for "textDocument/documentColor" when using Haskell Language Server

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[X] This is not a question. If you have a question, use discussions.

I investigated.

[X] I have read README.md, help documentation, and searched past issues but no solution.

Description

I noticed that, at each buffer change (input, etc.), neovim shows the following error message.

LSP[haskell-tools.nvim] Error condition, please check your setup and/or the [issue tracker](https://github.com/haskell/haskell-language-server/issues):
LSP: no handler for: "textDocument/documentColor"

This happens with haskell-tools.nvim and lspconfig.nvim's hls configuration. I provide a latter example for the former below.

I have tried to disable the lsp functionality or disable ccc by default, but the error message is still popping up.

Environments

Linux 6.6.60 (NixOS) x86_64 GNU/Linux
Neovim 0.10.2

Minimal reproducible full config

set termguicolors

let s:plug_dir = expand('/tmp/plugged/vim-plug')
if !filereadable(s:plug_dir .. '/autoload/plug.vim')
  execute printf('!curl -fLo %s/autoload/plug.vim --create-dirs https://raw.githubusercontent.com/junegunn/vim-plug/master/plug.vim', s:plug_dir)
end

execute 'set runtimepath+=' . s:plug_dir
call plug#begin(s:plug_dir)
Plug 'uga-rosa/ccc.nvim'
Plug 'neovim/nvim-lspconfig'
call plug#end()
PlugInstall | quit

lua <<EOF
local ccc = require("ccc")
local mapping = ccc.mapping

ccc.setup({
    pickers = { disable = { "haskell" } },
    highlighter = {
        auto_enable = true,
        lsp = true,
        excludes = {
            "haskell",
        },
    },
})

require("lspconfig").hls.setup({})
EOF

Steps to reproduce

Install haskell language server (the LSP needs to run for this issue to manifest)
Open the following example file (write the content to something like main.hs)
```
module Main where

main :: IO ()
main = undefined
```
Type anything in insert mode and the error will pop up.

Expected behavior

The call to "textDocument/documentColor" shouldn't fail with such errors at each buffer change.

Actual behavior

The call to "textDocument/documentColor" fails with an error message.

Additional context

Thank you for the project and for reading this issue!

uga-rosa / ccc.nvim