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