Fatal error: Uncaught Error: Interface 'Symfony\Component\EventDispatcher\EventDispatcherInterface' not found in C:\xampp\htdocs\admin\vendor\symfony\event-dispatcher\Debug\TraceableEventDispatcher.php:30 Stack trace: #0 {main} thrown in C:\xampp\htdocs\admin\vendor\symfony\event-dispatcher\Debug\TraceableEventDispatcher.php on line 30