Fatal error: Uncaught Error: Class "Symfony\Contracts\EventDispatcher\Event" not found in A:\risk_server\project\hr-server\vendor\symfony\mailer\Event\FailedMessageEvent.php:20 Stack trace: #0 {main} thrown in A:\risk_server\project\hr-server\vendor\symfony\mailer\Event\FailedMessageEvent.php on line 20