Fatal error: Uncaught Error: Class "SebastianBergmann\Comparator\ObjectComparator" not found in I:\www\frameworks\Laravel\vendor\phpspec\prophecy\src\Prophecy\Comparator\ProphecyComparator.php:17 Stack trace: #0 {main} thrown in I:\www\frameworks\Laravel\vendor\phpspec\prophecy\src\Prophecy\Comparator\ProphecyComparator.php on line 17