Fatal error: Uncaught Error: Class 'Symfony\Contracts\EventDispatcher\Event' not found in /home/acb20f5/public_html/alp/vendor/symfony/mailer/Event/MessageEvent.php:25 Stack trace: #0 {main} thrown in /home/acb20f5/public_html/alp/vendor/symfony/mailer/Event/MessageEvent.php on line 25