Fatal error: Uncaught Error: Class "TYPO3Fluid\Fluid\Core\ViewHelper\AbstractViewHelper" not found in /var/www/html/dev.hallescherfc.de/vendor/konradmichalik/typo3-environment-indicator/Classes/ViewHelpers/FaviconViewHelper.php:48 Stack trace: #0 {main} thrown in /var/www/html/dev.hallescherfc.de/vendor/konradmichalik/typo3-environment-indicator/Classes/ViewHelpers/FaviconViewHelper.php on line 48