Fatal error: Uncaught Error: Class "Symfony\Contracts\EventDispatcher\Event" not found in /home/rankting/public_html/ALT/ranketing.de (contao)/vendor/nelmio/security-bundle/ContentSecurityPolicy/Violation/Event.php:25 Stack trace: #0 {main} thrown in /home/rankting/public_html/ALT/ranketing.de (contao)/vendor/nelmio/security-bundle/ContentSecurityPolicy/Violation/Event.php on line 25