Fatal error: Uncaught Error: Class 'Symfony\Component\HttpKernel\Event\RequestEvent' not found in C:\Apache24\htdocs\cwbts\vendor\symfony\http-kernel\Event\ViewEvent.php:26 Stack trace: #0 {main} thrown in C:\Apache24\htdocs\cwbts\vendor\symfony\http-kernel\Event\ViewEvent.php on line 26