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