Fatal error: Uncaught Error: Class "SebastianBergmann\Comparator\Comparator" not found in I:\www\php_vendor_tests\vendor\sebastian\comparator\src\ScalarComparator.php:23 Stack trace: #0 {main} thrown in I:\www\php_vendor_tests\vendor\sebastian\comparator\src\ScalarComparator.php on line 23