Fatal error: Uncaught Error: Class 'Symfony\Component\EventDispatcher\Event' not found in /home/tbadigital/eventos/vendor/friendsofsymfony/user-bundle/Event/FormEvent.php:19 Stack trace: #0 {main} thrown in /home/tbadigital/eventos/vendor/friendsofsymfony/user-bundle/Event/FormEvent.php on line 19