Fatal error: Uncaught Error: Class "Symfony\Component\HttpKernel\Event\KernelEvent" not found in /home/gbc4/public_html/qrme/vendor/symfony/http-kernel/Event/ControllerEvent.php:28 Stack trace: #0 {main} thrown in /home/gbc4/public_html/qrme/vendor/symfony/http-kernel/Event/ControllerEvent.php on line 28