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