Advanced settings gone on my Orbi

My initial problem was that I have a Chord Polly that only can connect on 2.4 Ghz and the setup has to connect on the same bandwith with my iPhone. So I look and found out that it was possible in the Orbi admin centre to goto advenced and wifi settings and disable the SSID broadcast.

However when I logon the advanced tab is no different than the basic and nowhere can I find these options. Hope that someone can help me out here.

I have attached image of my admin page.