Fatal error: Uncaught Error: Class "SebastianBergmann\Comparator\ObjectComparator" not found in D:\Application\www\Training\vendor\sebastian\comparator\tests\_files\TestClassComparator.php:13 Stack trace: #0 {main} thrown in D:\Application\www\Training\vendor\sebastian\comparator\tests\_files\TestClassComparator.php on line 13