Fatal error: Uncaught Error: Class "Symfony\Contracts\EventDispatcher\Event" not found in /home/rankting/public_html/ALT/ranketing.de (contao)/vendor/friendsofsymfony/http-cache/src/BaseEvent.php:26 Stack trace: #0 {main} thrown in /home/rankting/public_html/ALT/ranketing.de (contao)/vendor/friendsofsymfony/http-cache/src/BaseEvent.php on line 26