Thanks a lot for your answer.
To test more easily, I have disabled the external plugin, trying to use only Google functions for this time.
By modifying my go.mod as you said, I’ve been able to pass through the net/context/ctxhttp error, and also github.com/golang/protobuf who came after. I found the good version to import by looking to go.mod file of the my current version of nakama (2.7.0) -> https://github.com/heroiclabs/nakama/blob/d5e0b5bb9df6c58c2cdbc91a00fbfdf8e12cc6f1/go.mod
I don’t know if it’s the correct workaround to ensure that dependencies are matching.
The problem is I still got the same error, but this time for golang.org/x/oauth2/internal, and this time this one is not listed in nakama go.mod.
Am I missing something to check the dependencies?