Fatal error: Uncaught Error: Class 'core_question\bank\column_base' not found in /home/cfaeatb/public_html/moodle/question/classes/bank/action_column_base.php:26 Stack trace: #0 {main} thrown in /home/cfaeatb/public_html/moodle/question/classes/bank/action_column_base.php on line 26