Fatal error: Uncaught Error: Class "TYPO3\CMS\Backend\Preview\StandardContentPreviewRenderer" not found in /var/www/html/dev.hallescherfc.de/vendor/b13/backendpreviews/Classes/Backend/Preview/StandardContentPreviewRenderer.php:18 Stack trace: #0 {main} thrown in /var/www/html/dev.hallescherfc.de/vendor/b13/backendpreviews/Classes/Backend/Preview/StandardContentPreviewRenderer.php on line 18