Fatal error: Uncaught Error: Class "core_external\external_api" not found in C:\Apache24\htdocs\moodle\user\classes\external\update_user_device_public_key.php:35 Stack trace: #0 {main} thrown in C:\Apache24\htdocs\moodle\user\classes\external\update_user_device_public_key.php on line 35