Fatal error: Uncaught Error: Interface 'Symfony\Component\EventDispatcher\EventSubscriberInterface' not found in /var/www/webdiplomacy.net/public_html/contrib/phpBB3-files/ext/webdip/headerban/event/main_listener.php:7 Stack trace: #0 {main} thrown in /var/www/webdiplomacy.net/public_html/contrib/phpBB3-files/ext/webdip/headerban/event/main_listener.php on line 7