Fatal error: Uncaught Error: Class "GuzzleHttp\Promise\RejectionException" not found in C:\AppServ\Apache\2.4.58\htdocs\sets\vendor\guzzlehttp\promises\src\AggregateException.php:10 Stack trace: #0 {main} thrown in C:\AppServ\Apache\2.4.58\htdocs\sets\vendor\guzzlehttp\promises\src\AggregateException.php on line 10