Fatal error: Uncaught Error: Class 'Neos\Media\Domain\Model\ThumbnailGenerator\AbstractThumbnailGenerator' not found in /var/www/vhosts/www.thomas-bartholomaeus.de/content/neoscms/Packages/Application/Neos.Media/Classes/Domain/Model/ThumbnailGenerator/DocumentThumbnailGenerator.php:21 Stack trace: #0 {main} thrown in /var/www/vhosts/www.thomas-bartholomaeus.de/content/neoscms/Packages/Application/Neos.Media/Classes/Domain/Model/ThumbnailGenerator/DocumentThumbnailGenerator.php on line 21