Fatal error: Uncaught Error: Class "SebastianBergmann\Comparator\Comparator" not found in /home2/celtixg1/public_html/script/vendor/google/gax/src/Testing/ProtobufMessageComparator.php:28 Stack trace: #0 {main} thrown in /home2/celtixg1/public_html/script/vendor/google/gax/src/Testing/ProtobufMessageComparator.php on line 28