Fatal error: Uncaught Error: Class "Symfony\Component\HttpKernel\Event\KernelEvent" not found in C:\Apache24_x64\htdocs\ipad\vendor\symfony\http-kernel\Event\FilterResponseEvent.php:21 Stack trace: #0 {main} thrown in C:\Apache24_x64\htdocs\ipad\vendor\symfony\http-kernel\Event\FilterResponseEvent.php on line 21