Fatal error: Uncaught Error: Class "SebastianBergmann\Comparator\Factory" not found in /var/www/html/usophy/vendor/phpspec/prophecy/src/Prophecy/Comparator/Factory.php:21 Stack trace: #0 {main} thrown in /var/www/html/usophy/vendor/phpspec/prophecy/src/Prophecy/Comparator/Factory.php on line 21