Fatal error: Uncaught Error: Class "core\external\exporter" not found in C:\Apache24\htdocs\moodle\reportbuilder\classes\external\custom_report_menu_cards_exporter.php:30 Stack trace: #0 {main} thrown in C:\Apache24\htdocs\moodle\reportbuilder\classes\external\custom_report_menu_cards_exporter.php on line 30