Fatal error: Uncaught Error: Class "Grpc\BaseStub" not found in /var/www/usonboard.com/grpc/examples/php/route_guide/Routeguide/RouteGuideClient.php:24 Stack trace: #0 {main} thrown in /var/www/usonboard.com/grpc/examples/php/route_guide/Routeguide/RouteGuideClient.php on line 24