Turn Cellular data off, just have WiFi.
Connect to the router (which should only have the Qu connected, via the network port on the Qu and a LAN port on the router).
Then try again – try with the supplied iPad first (I am assuming everything is at 1.9 at the moment, since you mentioned reloading things)
Then disconnect that and try with your own.
The Qu can support two QuPad connections, and a total of 8 connections when you add in the QuYou and QuControl connections as well. The Android app uses MIDI/TCP and is a separate connection count (only one available IIRC)