Fatal error: Uncaught Error: Class 'SebastianBergmann\Comparator\ObjectComparator' not found in /opt/lampp/htdocs/kuesioner/vendor/sebastian/comparator/src/DOMNodeComparator.php:18 Stack trace: #0 {main} thrown in /opt/lampp/htdocs/kuesioner/vendor/sebastian/comparator/src/DOMNodeComparator.php on line 18