phpactor: I can't get phpactor to work with coc

I’ve seen that phpactor might work on coc, but I don’t really know how to proceed, these have been my steps so far:

• Install coc on nvim, on vimrc: Plug 'neoclide/coc.nvim', {'branch': 'release'}
• Install phpactors coc-extension, on nvim: :CocInstall coc-phpactor
• Install phpactor globally and created a symlink to make it a command sudo ln -s ~/phpactor/bin/phpactor /usr/local/bin
• Configure coc-phpactor extension, from nvim do :CocConfig, and created this settings:

{
    "languageserver": {
        "phpactor": {
            "command": "phpactor",
            "trace.server": "verbose",
            "filetypes": ["php"]
        }
    }
}

With these, I restarted nvim, opened a PHP file with some issues:

• On airline I see a message Starting LS languageserver.phpactor going forever.
• No autocompletion suggestions (other than the nvim’s default autocompletion)
• Trying to GoToDefinition tells on airline: [coc.nvim] Definition provider not found for current document

Also, just to try out coc I also installed the json extension and everything works perfectly on json files.

Did I miss any configuration step?