Fatal error: Uncaught Error: Interface "Symfony\Component\EventDispatcher\EventSubscriberInterface" not found in /srv/www/sites/public/starter-cms/vendor/symfony/http-kernel/EventListener/FragmentListener.php:34 Stack trace: #0 {main} thrown in /srv/www/sites/public/starter-cms/vendor/symfony/http-kernel/EventListener/FragmentListener.php on line 34