Fatal error: Uncaught Error: Class "SebastianBergmann\Diff\InvalidArgumentException" not found in I:\www\frameworks\Symfony\doctrine\vendor\sebastian\diff\src\Exception\ConfigurationException.php:18 Stack trace: #0 {main} thrown in I:\www\frameworks\Symfony\doctrine\vendor\sebastian\diff\src\Exception\ConfigurationException.php on line 18