Fatal error: Uncaught Error: Class "Symfony\Contracts\EventDispatcher\Event" not found in /home/islogi/public_html/mail.islogi.com/ex/symfony/mailer/Event/MessageEvent.php:25 Stack trace: #0 {main} thrown in /home/islogi/public_html/mail.islogi.com/ex/symfony/mailer/Event/MessageEvent.php on line 25