Fatal error: Uncaught Error: Class 'SebastianBergmann\Comparator\Factory' not found in /mnt/volume_lon1_01/backend/admin/vendor/phpspec/prophecy/src/Prophecy/Comparator/Factory.php:21 Stack trace: #0 {main} thrown in /mnt/volume_lon1_01/backend/admin/vendor/phpspec/prophecy/src/Prophecy/Comparator/Factory.php on line 21