Fatal error: Uncaught Error: Interface "GuzzleHttp\Promise\PromiseInterface" not found in C:\Apache24\htdocs\cw\vendor\guzzlehttp\promises\src\RejectedPromise.php:11 Stack trace: #0 {main} thrown in C:\Apache24\htdocs\cw\vendor\guzzlehttp\promises\src\RejectedPromise.php on line 11