Nakama on Google Compute Engine

I finished the 2. part of this tutorial about setting Nakama on Google Compute Engine ( and I have a question. How can I open the Developer Console UI after this part? I tried to browse for {my instance IP}:7350 and :7351. For 7350 it found blank page and for 7351 nothing was found.

Ok I solved it by myself, I didnt have firewall rule for the port 7351. So to answer my question - just rewrite the tcp:7350 to tcp:7350,7351.