Fatal error: Uncaught Error: Class "TYPO3Fluid\Fluid\Core\ViewHelper\AbstractViewHelper" not found in /var/www/html/dev.hallescherfc.de/vendor/extcode/cart/Classes/ViewHelpers/AdditionalJsonViewHelper.php:14 Stack trace: #0 {main} thrown in /var/www/html/dev.hallescherfc.de/vendor/extcode/cart/Classes/ViewHelpers/AdditionalJsonViewHelper.php on line 14