Hi,
I also have exactly the same problem on 3 different Android devices (Andoid 7, 9 and 10 versions), using different ways to connect to the internet. It worked untill a couple of days ago. If you did not log out it seemed to work, but finding tones did not work anymore. So that problem is also the same. The app starts but in the background it does not connect with Line 6. It has nothing to do with the internet connection. If you disconnect internet it gives another error: No connection.
On my iPhone it still works !
So, the conclusion is that the problem hits all Android users. iPhone users have no problems.
If someone had a solution we all would be very happy.
Pim.