Fatal error: Uncaught Error: Class "Symfony\Component\Form\FormEvent" not found in /home/wordpri/www/cci/amar/Projet-v1 2 apache/vendor/symfony/form/Event/PreSetDataEvent.php:21 Stack trace: #0 {main} thrown in /home/wordpri/www/cci/amar/Projet-v1 2 apache/vendor/symfony/form/Event/PreSetDataEvent.php on line 21