Fatal error: Uncaught Error: Class "core_external\external_api" not found in C:\xamppasploms\htdocs\asaploms\payment\classes\external\get_available_gateways.php:34 Stack trace: #0 {main} thrown in C:\xamppasploms\htdocs\asaploms\payment\classes\external\get_available_gateways.php on line 34