Fatal error: Uncaught Error: Class 'SebastianBergmann\Comparator\Comparator' not found in D:\xampp\htdocs\psp\backend\vendor\sebastian\comparator\src\SplObjectStorageComparator.php:17 Stack trace: #0 {main} thrown in D:\xampp\htdocs\psp\backend\vendor\sebastian\comparator\src\SplObjectStorageComparator.php on line 17