Fatal error: Uncaught Error: Interface "ILIAS\Container\Content\BlockSequencePart" not found in /var/www/html/ilias/components/ILIAS/Container/Content/Block/interface.Block.php:26 Stack trace: #0 {main} thrown in /var/www/html/ilias/components/ILIAS/Container/Content/Block/interface.Block.php on line 26