Fatal error: Type of Ddnet\Ddgodikal\Controller\ThumbnailAjaxController::$defaultViewObjectName must be ?string (as in class TYPO3\CMS\Extbase\Mvc\Controller\ActionController) in /var/www/clients/client89/web1545/web/vendor/ddnet/ddgodikal/Classes/Controller/ThumbnailAjaxController.php on line 13