Fatal error: Uncaught Error: Class "Vich\UploaderBundle\Handler\AbstractHandler" not found in /var/www/crm_killing_ninja/core/backend/MediaObjects/Services/MediaObjectFileHandler.php:33 Stack trace: #0 {main} thrown in /var/www/crm_killing_ninja/core/backend/MediaObjects/Services/MediaObjectFileHandler.php on line 33