[Solved] How to connect to a hidden wifi?

I noticed that my gateway did not have a possibility to connect to a hidden wifi so i used sudo raspi-config to connect but it does not seam to work and now my gateway shows no wifi-config anymore. The page is dark-transparent and seams to not load.
Is it possible to work with hidden wifi-networks?

There’s no way to set up a hidden network via the UI. You’d have to do it the normal Raspbian way, i.e. via raspi-config or wpa_supplicant.conf.

Other than that, the gateway should not care what network it’s on.

Is there some roadmap for such features?

Not currently, but I’ve filed an issue: https://github.com/mozilla-iot/gateway/issues/2323