TwigCS default ruleset gets prefixed

The default ruleset for twigCS gets scoped.
Resulting in errors:

Snippet:

class TwigCs extends \GrumPHP\Task\AbstractExternalTask
{
    public static function getConfigurableOptions() : \_HumbugBoxdfa46d19239b\Symfony\Component\OptionsResolver\OptionsResolver
    {
        $resolver->setDefaults(
            [
                //.....
                'ruleset'      => '_HumbugBoxdfa46d19239b\\FriendsOfTwig\\Twigcs\\Ruleset\\Official',
                //.....
            ]
         );
        return $resolver;
    }
...

This specific class could be namespaced if it does not break anything else.

Locate the TwigCs class and inspect getConfigurableOptions(), especially the default ruleset value shown in the issue. Reproduce the scoped-ruleset error, then verify that the default ruleset is no longer prefixed and that the reported TwigCS errors are resolved.