Fatal error: Uncaught Error: Interface 'Symfony\Component\EventDispatcher\EventSubscriberInterface' not found in /opt/lampp/htdocs/vendor/symfony/psr-http-message-bridge/EventListener/PsrResponseListener.php:18 Stack trace: #0 {main} thrown in /opt/lampp/htdocs/vendor/symfony/psr-http-message-bridge/EventListener/PsrResponseListener.php on line 18