Fatal error: Uncaught Error: Class 'SebastianBergmann\Comparator\Factory' not found in C:\xampp\htdocs\admin\vendor\phpspec\prophecy\src\Prophecy\Comparator\Factory.php:21 Stack trace: #0 {main} thrown in C:\xampp\htdocs\admin\vendor\phpspec\prophecy\src\Prophecy\Comparator\Factory.php on line 21