We are facing this error while creating forum for a course.
| Database transaction aborted automatically in C:\Inetpub\vhosts\www.net\edu.www.net\moodle/course/modedit.php | php_error | |||
| 2021-06-25 16:38:43 | Default exception handler: Coding error detected, it must be fixed by a programmer: The data source class does not exist. Debug: Error code: codingerror * line 506 of \cache\classes\definition.php: coding_exception thrown * line 324 of \cache\classes\helper.php: call to cache_definition::load() * line 2771 of \lib\grade\grade_category.php: call to cache_helper::purge_by_event() * line 2723 of \lib\grade\grade_category.php: call to grade_category::clean_record_set() * line 266 of \lib\grade\grade_object.php: call to grade_category->notify_changed() * line 263 of \lib\grade\grade_category.php: call to grade_object->update() * line 2135 of \lib\grade\grade_category.php: call to grade_category->update() * line 1577 of \lib\grade\grade_category.php: call to grade_category->get_children() * line 447 of \lib\grade\grade_category.php: call to grade_category->auto_update_weights() * line 1180 of \lib\gradelib.php: call to grade_category->pre_regrade_final_grades() * line 364 of \course\modlib.php: call to grade_regrade_final_grades() * line 180 of \course\modlib.php: call to edit_module_post_actions() * line 154 of \course\modedit.php: call to add_moduleinfo() |