An error occurs during execution.

[HanHoRang]

$ go get -u github.com/philips/grpc-gateway-example

cd /root/go/src/github.com/grpc-ecosystem/grpc-gateway; git pull --ff-only
There is no tracking information for the current branch.
Please specify which branch you want to merge with.
See git-pull(1) for details.

git pull <remote> <branch>

If you wish to set tracking information for this branch you can do so with:

git branch --set-upstream-to=origin/<branch> v1.4.1

package github.com/grpc-ecosystem/grpc-gateway/runtime: exit status 1
cd /root/go/src/github.com/golang/protobuf; git pull --ff-only
There is no tracking information for the current branch.
Please specify which branch you want to merge with.
See git-pull(1) for details.

git pull

If you wish to set tracking information for this branch you can do so with:

git branch --set-upstream-to=origin/ v1.2.0

package github.com/golang/protobuf/proto: exit status 1

what is that?

[HanHoRang]

I solve them(go get -u -v github.com/philips/grpc-gateway-example)
But not execute
$ grpc-gateway-example serve
grpc-gateway-example: command not found
$ go build

../../google.golang.org/genproto/googleapis/rpc/status/status.pb.go:42:11: undefined: "github.com/golang/protobuf/proto".ProtoPackageIsVersion4
google.golang.org/grpc/binarylog/grpc_binarylog_v1
../../google.golang.org/grpc/binarylog/grpc_binarylog_v1/binarylog.pb.go:46:11: undefined: "github.com/golang/protobuf/proto".ProtoPackageIsVersion4
 google.golang.org/genproto/googleapis/api/annotations
../../google.golang.org/genproto/googleapis/api/annotations/annotations.pb.go:41:11: undefined: "github.com/golang/protobuf/proto".ProtoPackageIsVersion4
../../google.golang.org/genproto/googleapis/api/annotations/client.pb.go:41:11: undefined: "github.com/golang/protobuf/proto".ProtoPackageIsVersion4
../../google.golang.org/genproto/googleapis/api/annotations/field_behavior.pb.go:42:11: undefined: "github.com/golang/protobuf/proto".ProtoPackageIsVersion4
../../google.golang.org/genproto/googleapis/api/annotations/http.pb.go:41:11: undefined: "github.com/golang/protobuf/proto".ProtoPackageIsVersion4
../../google.golang.org/genproto/googleapis/api/annotations/resource.pb.go:42:11: undefined: "github.com/golang/protobuf/proto".ProtoPackageIsVersion4```

[HanHoRang]

I deleted the above library and updated the golang version to 1.13.15.
When the following command is executed, an error occurs in echopb.

../go/src/github.com/philips/grpc-gateway-example/echopb/service.pb.gw.go:95:39: not enough arguments in call to runtime.AnnotateContext
        have ("context".Context, *runtime.ServeMux, *http.Request)
        want ("context".Context, *runtime.ServeMux, *http.Request, string)
../go/src/github.com/philips/grpc-gateway-example/echopb/service.pb.gw.go:107:29: cannot use resp (type protoiface.MessageV1) as type protoreflect.ProtoMessage in argument to forward_EchoService_Echo_0:
        protoiface.MessageV1 does not implement protoreflect.ProtoMessage (missing ProtoReflect method)```