Fatal error: Uncaught Error: Class 'SebastianBergmann\Comparator\ObjectComparator' not found in C:\xampp\htdocs\admin\vendor\sebastian\comparator\src\DOMNodeComparator.php:21 Stack trace: #0 {main} thrown in C:\xampp\htdocs\admin\vendor\sebastian\comparator\src\DOMNodeComparator.php on line 21