Fatal error: Uncaught Error: Class "core_question\bank\action_column_base" not found in /home/edepracl/public_html/moodle30/question/classes/bank/edit_action_column.php:25 Stack trace: #0 {main} thrown in /home/edepracl/public_html/moodle30/question/classes/bank/edit_action_column.php on line 25