Fatal error: Uncaught Error: Interface "Symfony\Component\EventDispatcher\EventSubscriberInterface" not found in /home/astechc1/public_html/vendor/symfony/notifier/EventListener/SendFailedMessageToNotifierListener.php:25 Stack trace: #0 {main} thrown in /home/astechc1/public_html/vendor/symfony/notifier/EventListener/SendFailedMessageToNotifierListener.php on line 25