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