Fatal error: Uncaught Error: Class 'Symfony\Component\HttpKernel\Event\KernelEvent' not found in D:\xampp7\htdocs\www\nbkm\show_mu\vendor\symfony\http-kernel\Event\FinishRequestEvent.php:19 Stack trace: #0 {main} thrown in D:\xampp7\htdocs\www\nbkm\show_mu\vendor\symfony\http-kernel\Event\FinishRequestEvent.php on line 19