Fatal error: Uncaught Error: Class 'SebastianBergmann\Comparator\Comparator' not found in C:\xampp\htdocs\admin\vendor\phpspec\prophecy\src\Prophecy\Comparator\ClosureComparator.php:22 Stack trace: #0 {main} thrown in C:\xampp\htdocs\admin\vendor\phpspec\prophecy\src\Prophecy\Comparator\ClosureComparator.php on line 22