Fatal error: Uncaught Error: Class "Google\ApiCore\KnownTypes" not found in /opt/lampp/htdocs/msjwebcp/vendor/google/gax/src/Serializer.php:571 Stack trace: #0 /opt/lampp/htdocs/msjwebcp/vendor/google/gax/src/Serializer.php(581): Google\ApiCore\Serializer::loadKnownMetadataTypes() #1 {main} thrown in /opt/lampp/htdocs/msjwebcp/vendor/google/gax/src/Serializer.php on line 571