Fatal error: Uncaught Error: Interface "Symfony\Contracts\EventDispatcher\EventDispatcherInterface" not found in C:\xampp\htdocs\sitelec-ib.ddns.net\vendor\symfony\event-dispatcher\EventDispatcherInterface.php:23 Stack trace: #0 {main} thrown in C:\xampp\htdocs\sitelec-ib.ddns.net\vendor\symfony\event-dispatcher\EventDispatcherInterface.php on line 23