Fatal error: Uncaught Error: Class "Contao\Controller" not found in /home/rankting/public_html/ALT/ranketing.de (contao)/vendor/numero2/contao-marketing-suite/src/Resources/contao/classes/Backend.php:25 Stack trace: #0 {main} thrown in /home/rankting/public_html/ALT/ranketing.de (contao)/vendor/numero2/contao-marketing-suite/src/Resources/contao/classes/Backend.php on line 25