Fatal error: Uncaught Error: Class "ILIAS\ResourceStorage\Stakeholder\AbstractResourceStakeholder" not found in /var/www/html/ilias/components/ILIAS/Exercise/InstructionFile/class.ilExcInstructionFilesStakeholder.php:25 Stack trace: #0 {main} thrown in /var/www/html/ilias/components/ILIAS/Exercise/InstructionFile/class.ilExcInstructionFilesStakeholder.php on line 25