Fatal error: Uncaught Error: Class "Symfony\Contracts\EventDispatcher\Event" not found in C:\xampp\htdocs\retrodex\helpdesk\vendor\symfony\security-http\Event\LogoutEvent.php:22 Stack trace: #0 {main} thrown in C:\xampp\htdocs\retrodex\helpdesk\vendor\symfony\security-http\Event\LogoutEvent.php on line 22