Fatal error: Uncaught Error: Interface "GuzzleHttp\Promise\PromiseInterface" not found in C:\wamp64\houda\vendor\guzzlehttp\promises\src\FulfilledPromise.php:20 Stack trace: #0 {main} thrown in C:\wamp64\houda\vendor\guzzlehttp\promises\src\FulfilledPromise.php on line 20