Fatal error: Uncaught Error: Class 'Symfony\Component\HttpKernel\Event\KernelEvent' not found in D:\svn\epic-site(사전예약)\default\vendor\symfony\http-kernel\Event\PostResponseEvent.php:21 Stack trace: #0 {main} thrown in D:\svn\epic-site(사전예약)\default\vendor\symfony\http-kernel\Event\PostResponseEvent.php on line 21