Fatal error: Uncaught Error: Class 'FOS\UserBundle\Event\GroupEvent' not found in /home/itscm/dev.its.cm/itsgateway/vendor/friendsofsymfony/user-bundle/Event/FilterGroupResponseEvent.php:18 Stack trace: #0 {main} thrown in /home/itscm/dev.its.cm/itsgateway/vendor/friendsofsymfony/user-bundle/Event/FilterGroupResponseEvent.php on line 18