Fatal error: Uncaught Error: Class "FOS\UserBundle\Event\GroupEvent" not found in C:\xampp\htdocs\BK\bateriasec\vendor\friendsofsymfony\user-bundle\Event\GetResponseGroupEvent.php:23 Stack trace: #0 {main} thrown in C:\xampp\htdocs\BK\bateriasec\vendor\friendsofsymfony\user-bundle\Event\GetResponseGroupEvent.php on line 23