Fatal error: Uncaught Error: Class "Symfony\Component\Process\Pipes\AbstractPipes" not found in E:\www\frey\qgmvc\v1.0\composer\vendor\symfony\process\Pipes\UnixPipes.php:23 Stack trace: #0 {main} thrown in E:\www\frey\qgmvc\v1.0\composer\vendor\symfony\process\Pipes\UnixPipes.php on line 23