[el-Odysseas]

I can also confirm the issue with the app not loading without a wifi connection.
I used my mobile phone as a mobile-hotspot, turned on the mobile data, connected my laptop with the mobilsheets for windows 10 and was able to launch the app.

I could then turn off the mobile data and keep using the app . When turning off the mobile-hotspot though, the app stops working and stucks on the last used screen.

Since I cannot restore windows at the moment (I do not own the laptop), I hope that windows-store can find another solution to the problem...

Greetings!