404. That’s an error.

The requested URL /users/oauth/?server=facebook&nv_redirect=YrVErC7FjmoFP3oFHaWiveD2P_X9bqD3TtpXasCLoPtb4YYlOxLUwLGg8ZL8iBdKEwfyNHdL2Um3FwHeUDPwOg%2C%2C was not found on this server. That’s all we know.