Fatal error: Uncaught Error: Class "Symfony\Component\HttpKernel\Event\KernelEvent" not found in D:\NTG_App\www\TIL_Production_Monitoring\vendor\symfony\http-kernel\Event\ControllerEvent.php:28 Stack trace: #0 {main} thrown in D:\NTG_App\www\TIL_Production_Monitoring\vendor\symfony\http-kernel\Event\ControllerEvent.php on line 28