Fatal error: Uncaught Error: Interface 'Symfony\Contracts\EventDispatcher\EventDispatcherInterface' not found in C:\Apache24\htdocs\vendor.old2\symfony\event-dispatcher\EventDispatcherInterface.php:23 Stack trace: #0 {main} thrown in C:\Apache24\htdocs\vendor.old2\symfony\event-dispatcher\EventDispatcherInterface.php on line 23