Fatal error: Uncaught Error: Class "Symfony\Contracts\EventDispatcher\Event" not found in C:\apache24\htdocs\rccm\portailWeb\vendor\symfony\mailer\Event\MessageEvent.php:23 Stack trace: #0 {main} thrown in C:\apache24\htdocs\rccm\portailWeb\vendor\symfony\mailer\Event\MessageEvent.php on line 23