Fatal error: Uncaught Error: Class "Symfony\Component\HttpKernel\Event\KernelEvent" not found in /var/www/html/repo/invoicing-salepropos/vendor/symfony/http-kernel/Event/FilterResponseEvent.php:21 Stack trace: #0 {main} thrown in /var/www/html/repo/invoicing-salepropos/vendor/symfony/http-kernel/Event/FilterResponseEvent.php on line 21