Fatal error: Uncaught Error: Interface "GuzzleHttp\Promise\PromiseInterface" not found in D:\NTG_App\www\store_management_system\vendor\guzzlehttp\promises\src\FulfilledPromise.php:15 Stack trace: #0 {main} thrown in D:\NTG_App\www\store_management_system\vendor\guzzlehttp\promises\src\FulfilledPromise.php on line 15