Fatal error: Uncaught Error: Class "core_question\local\bank\column_base" not found in C:\xampp\htdocs\laberit01\html\moodle\question\classes\local\bank\edit_menu_column.php:39 Stack trace: #0 {main} thrown in C:\xampp\htdocs\laberit01\html\moodle\question\classes\local\bank\edit_menu_column.php on line 39