Fatal error: Uncaught Error: Class "core_competency\persistent" not found in C:\Apache24\htdocs\moodle\admin\tool\cohortroles\classes\cohort_role_assignment.php:35 Stack trace: #0 {main} thrown in C:\Apache24\htdocs\moodle\admin\tool\cohortroles\classes\cohort_role_assignment.php on line 35