Fatal error: Uncaught Error: Interface "Symfony\Component\EventDispatcher\EventSubscriberInterface" not found in /home/alkhalaffamily/public_html/new_qasa/vendor/symfony/http-kernel/EventListener/DisallowRobotsIndexingListener.php:23 Stack trace: #0 {main} thrown in /home/alkhalaffamily/public_html/new_qasa/vendor/symfony/http-kernel/EventListener/DisallowRobotsIndexingListener.php on line 23