Fatal error: Uncaught Error: Class 'SebastianBergmann\Comparator\ObjectComparator' not found in /data/htmlwww/common/jpgraph/vendor/phpspec/prophecy/src/Prophecy/Comparator/ProphecyComparator.php:17 Stack trace: #0 {main} thrown in /data/htmlwww/common/jpgraph/vendor/phpspec/prophecy/src/Prophecy/Comparator/ProphecyComparator.php on line 17