Fatal error: Uncaught Error: Class "ILIAS\ResourceStorage\Stakeholder\AbstractResourceStakeholder" not found in /var/www/html/ilias/components/ILIAS/Exercise/Submission/class.ilExcSubmissionStakeholder.php:23 Stack trace: #0 {main} thrown in /var/www/html/ilias/components/ILIAS/Exercise/Submission/class.ilExcSubmissionStakeholder.php on line 23