Fatal error: Uncaught Error: Class "Symfony\Component\Console\Helper\DescriptorHelper" not found in I:\www\frameworks\Symfony\doctrine\vendor\symfony\form\Console\Helper\DescriptorHelper.php:24 Stack trace: #0 {main} thrown in I:\www\frameworks\Symfony\doctrine\vendor\symfony\form\Console\Helper\DescriptorHelper.php on line 24