I have the same problem, I entered the activation key, I checked in eLicenser setup is activated, it always comes out the following message: "There is no host assigned to this IP address. Make sure your eLicenser is activated." the app sees cubase computer but can not connect.
I had the same problem. If you have both WiFi and PHY (wired) networks, you're going to have to disconnect one or the other in order for this to work. I bought a WiFi adapter to use the original iOS app, but you don't need that anymore.
Once you do that, you should have a host name to connect to.