Fatal error: Uncaught Error: Interface "Symfony\Component\EventDispatcher\EventSubscriberInterface" not found in /home/sumi/public_html/vendor/symfony/mailer/EventListener/DkimSignedMessageListener.php:24 Stack trace: #0 {main} thrown in /home/sumi/public_html/vendor/symfony/mailer/EventListener/DkimSignedMessageListener.php on line 24