Fatal error: Uncaught Error: Class 'Symfony\Component\HttpKernel\Event\RequestEvent' not found in D:\workspaces\liZiPingBack\vendor\symfony\security-http\Event\LazyResponseEvent.php:25 Stack trace: #0 {main} thrown in D:\workspaces\liZiPingBack\vendor\symfony\security-http\Event\LazyResponseEvent.php on line 25