Fatal error: Uncaught Error: Class "SebastianBergmann\Comparator\Factory" not found in I:\www\frameworks\Symfony\doctrine\vendor\phpspec\prophecy\src\Prophecy\Comparator\Factory.php:21 Stack trace: #0 {main} thrown in I:\www\frameworks\Symfony\doctrine\vendor\phpspec\prophecy\src\Prophecy\Comparator\Factory.php on line 21