Fatal error: Uncaught Error: Interface "ILIAS\ResourceStorage\Flavour\Definition\FlavourDefinition" not found in /var/www/html/ilias/components/ILIAS/ResourceStorage/src/Flavour/Definition/ToGreyScale.php:28 Stack trace: #0 {main} thrown in /var/www/html/ilias/components/ILIAS/ResourceStorage/src/Flavour/Definition/ToGreyScale.php on line 28