Both 3.0.4 and 3.1.0 are only commited to GitHub and not visible in the Releases.

NodeBB is probably only checking for Releases.

So the plugin creator (@julian) has to mark them as Releases.

I am also experiencing this Issue and are interested in the solution of this.

@julian Could it be that the problem is caused by using /auth/google/callback instead of /oauth2callback in the callbackURL?