Fatal error: Uncaught Error: Class "TYPO3\CMS\Backend\Controller\FormSlugAjaxController" not found in /var/www/html/dev.hallescherfc.de/vendor/wazum/sluggi/Classes/Backend/Controller/FormSlugAjaxController.php:19 Stack trace: #0 {main} thrown in /var/www/html/dev.hallescherfc.de/vendor/wazum/sluggi/Classes/Backend/Controller/FormSlugAjaxController.php on line 19