Fatal error: Uncaught Error: Class "SebastianBergmann\Comparator\ObjectComparator" not found in C:\xampp\htdocs\kalimark\vendor\sebastian\comparator\tests\_fixture\TestClassComparator.php:13 Stack trace: #0 {main} thrown in C:\xampp\htdocs\kalimark\vendor\sebastian\comparator\tests\_fixture\TestClassComparator.php on line 13