Fatal error: Uncaught Error: Class "GuzzleHttp\Promise\RejectionException" not found in D:\Apache24\www\qilu_sap\back-end\vendor\guzzlehttp\promises\src\CancellationException.php:8 Stack trace: #0 {main} thrown in D:\Apache24\www\qilu_sap\back-end\vendor\guzzlehttp\promises\src\CancellationException.php on line 8