Fatal error: Uncaught Error: Class 'FOS\UserBundle\Event\GroupEvent' not found in /home/itscm/dev.its.cm/itsrestapi/vendor/friendsofsymfony/user-bundle/Event/GetResponseGroupEvent.php:16 Stack trace: #0 {main} thrown in /home/itscm/dev.its.cm/itsrestapi/vendor/friendsofsymfony/user-bundle/Event/GetResponseGroupEvent.php on line 16