Fatal error: Uncaught Error: Interface "GuzzleHttp\Promise\PromiseInterface" not found in C:\melius\michael.douglas\web\prod\credpay\_common\classes\vendor\guzzlehttp\promises\src\FulfilledPromise.php:15 Stack trace: #0 {main} thrown in C:\melius\michael.douglas\web\prod\credpay\_common\classes\vendor\guzzlehttp\promises\src\FulfilledPromise.php on line 15