Fatal error: Uncaught Error: Class 'Symfony\Component\EventDispatcher\Event' not found in C:\xampp73\htdocs\Respaldos\tracking_cie_v1\vendor\symfony\event-dispatcher\GenericEvent.php:21 Stack trace: #0 {main} thrown in C:\xampp73\htdocs\Respaldos\tracking_cie_v1\vendor\symfony\event-dispatcher\GenericEvent.php on line 21