Fatal error: Uncaught Error: Class "core_external\external_api" not found in /home/revenuem/moodle.orbitassociation.com/admin/tool/usertours/classes/external/tour.php:33 Stack trace: #0 {main} thrown in /home/revenuem/moodle.orbitassociation.com/admin/tool/usertours/classes/external/tour.php on line 33