Fatal error: Uncaught Error: Class "core_question\local\bank\column_base" not found in C:\xampp\htdocs\laberit01\html\moodle\question\classes\local\bank\action_column_base.php:34 Stack trace: #0 {main} thrown in C:\xampp\htdocs\laberit01\html\moodle\question\classes\local\bank\action_column_base.php on line 34