Fatal error: Uncaught Error: Interface "GuzzleHttp\Promise\PromiseInterface" not found in D:\Application\www\E-Tracking\vendor\guzzlehttp\promises\src\Coroutine.php:43 Stack trace: #0 {main} thrown in D:\Application\www\E-Tracking\vendor\guzzlehttp\promises\src\Coroutine.php on line 43