Fatal error: Uncaught Error: Interface "Symfony\Component\Process\Pipes\PipesInterface" not found in E:\www\frey\qgmvc\v1.0\composer\vendor\symfony\process\Pipes\AbstractPipes.php:21 Stack trace: #0 {main} thrown in E:\www\frey\qgmvc\v1.0\composer\vendor\symfony\process\Pipes\AbstractPipes.php on line 21