Fatal error: Uncaught Error: Interface "Http\Promise\Promise" not found in D:\Application\www\E-Tracking\vendor\php-http\httplug\src\Promise\HttpFulfilledPromise.php:9 Stack trace: #0 {main} thrown in D:\Application\www\E-Tracking\vendor\php-http\httplug\src\Promise\HttpFulfilledPromise.php on line 9