Fatal error: Uncaught Error: Interface "GuzzleHttp\ClientInterface" not found in E:\www\frey\qgmvc\v1.0\composer\vendor\guzzlehttp\guzzle\src\Client.php:26 Stack trace: #0 {main} thrown in E:\www\frey\qgmvc\v1.0\composer\vendor\guzzlehttp\guzzle\src\Client.php on line 26