Fatal error: Uncaught Error: Class "SebastianBergmann\Comparator\ObjectComparator" not found in /var/www/html/testy/example-app/vendor/sebastian/comparator/src/MockObjectComparator.php:18 Stack trace: #0 {main} thrown in /var/www/html/testy/example-app/vendor/sebastian/comparator/src/MockObjectComparator.php on line 18