Fatal error: Uncaught Error: Class "Symfony\Contracts\EventDispatcher\Event" not found in D:\xampp\htdocs\pimcore\my-project\vendor\symfony\security-http\Event\LoginSuccessEvent.php:33 Stack trace: #0 {main} thrown in D:\xampp\htdocs\pimcore\my-project\vendor\symfony\security-http\Event\LoginSuccessEvent.php on line 33