I have exactly the same issue did this ever get solved?
I have set up a static IP network
Can connect to utrack24 via computer (wired or wireless)
Can open the update page on two android devices
Cannot connect to the utrack24 via the android app
Both devices say no CopperLan detected.
Just got this and I need it working this Monday evening (2nd Sept 2019) on Android and wireless or it’s going back to the retailer.