Fatal error: Uncaught Error: Interface "renderable" not found in C:\Apache24\htdocs\moodle\question\bank\editquestion\classes\output\add_new_question.php:30 Stack trace: #0 {main} thrown in C:\Apache24\htdocs\moodle\question\bank\editquestion\classes\output\add_new_question.php on line 30