Stack trace: •line 588 of /lib/dml/moodle_database.php: coding_exception thrown
•line 114 of /enrol/category/locallib.php: call to moodle_database->get_in_or_equal()
•line ? of unknownfile: call to enrol_category_handler::role_unassigned()
•line 296 of /lib/eventslib.php: call to call_user_func()
•line 518 of /lib/eventslib.php: call to events_dispatch()
•line 2746 of /lib/accesslib.php: call to events_trigger()
•line 2693 of /lib/accesslib.php: call to role_unassign_all()
•line 129 of /admin/roles/assign.php: call to role_unassign()