Fatal error: Uncaught Error: Interface "Symfony\Component\EventDispatcher\EventSubscriberInterface" not found in /home/slsiluser/public_html/service-portal-mobile-responsive/vendor/symfony/psr-http-message-bridge/EventListener/PsrResponseListener.php:18 Stack trace: #0 {main} thrown in /home/slsiluser/public_html/service-portal-mobile-responsive/vendor/symfony/psr-http-message-bridge/EventListener/PsrResponseListener.php on line 18