Fatal error: Uncaught Error: Class "Symfony\Component\HttpKernel\Event\RequestEvent" not found in C:\xampp\htdocs\sitelec-ib.ddns.net\vendor\symfony\http-kernel\Event\ExceptionEvent.php:30 Stack trace: #0 {main} thrown in C:\xampp\htdocs\sitelec-ib.ddns.net\vendor\symfony\http-kernel\Event\ExceptionEvent.php on line 30