Fatal error: Uncaught Error: Interface "GuzzleHttp\Promise\PromiseInterface" not found in C:\Apache24_x64\htdocs\__cms\vendor\guzzlehttp\promises\src\FulfilledPromise.php:10 Stack trace: #0 {main} thrown in C:\Apache24_x64\htdocs\__cms\vendor\guzzlehttp\promises\src\FulfilledPromise.php on line 10