Fatal error: Uncaught Error: Interface 'Symfony\Component\EventDispatcher\EventSubscriberInterface' not found in /home/eberhardschwarze/public_html/vendor/nelmio/security-bundle/EventListener/XssProtectionListener.php:23
Stack trace:
#0 {main}
thrown in /home/eberhardschwarze/public_html/vendor/nelmio/security-bundle/EventListener/XssProtectionListener.php on line 23