Fatal error: Uncaught Error: Class "Symfony\Contracts\EventDispatcher\Event" not found in /home/wordpri/www/cci/amar/Projet-v1 2 apache/vendor/symfony/form/FormEvent.php:19 Stack trace: #0 {main} thrown in /home/wordpri/www/cci/amar/Projet-v1 2 apache/vendor/symfony/form/FormEvent.php on line 19