Have u set your route to Named route ?

Yes, you can see the Problem in my Video

Has no one an idea?

How / where are you calling the check() method? If you want to be redirected, then you should return the redirect in your controller method i.e.:

<?php

use Modules\Users\Acl\Libs\ACL;

class MyController {

    public function index()
    {
        // Check if ACL passes, if not, return the redirect
        if (! $acl = $this->acl->check($rightName, $redirect))
        {
            // Return the ACL response
            return $acl
        }

        // DO something

    }

}

Edit: It might be better to throw an InsufficientPermissionsException in the check method, such that the ACL class is not responsible for handling responses. You can then catch that exception in your controller (or any other class) and respond accordingly.