Fatal error: Uncaught Error: Class "GuzzleHttp\Promise\RejectionException" not found in C:\Apache24_x64\htdocs\__cms\vendor\guzzlehttp\promises\src\CancellationException.php:7 Stack trace: #0 {main} thrown in C:\Apache24_x64\htdocs\__cms\vendor\guzzlehttp\promises\src\CancellationException.php on line 7