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