Fatal error: Uncaught Error: Interface "Symfony\Component\EventDispatcher\EventSubscriberInterface" not found in /home1/aihika/public_html/elephant-society/vendor_old/symfony/http-kernel/EventListener/DumpListener.php:26 Stack trace: #0 {main} thrown in /home1/aihika/public_html/elephant-society/vendor_old/symfony/http-kernel/EventListener/DumpListener.php on line 26