Fatal error: Uncaught Error: Class "Contao\CoreBundle\Controller\AbstractController" not found in /home/exklusivbeautysa/public_html/vendor/contao/core-bundle/src/Controller/AbstractBackendController.php:23 Stack trace: #0 {main} thrown in /home/exklusivbeautysa/public_html/vendor/contao/core-bundle/src/Controller/AbstractBackendController.php on line 23