Well, like the title says. When adding my Sub via the (latest) Android app it crashes. I wired it to the router and that makes it crash even faster. The setup was fine until I bought two Era100s which was a pain as well to add to the environment.
So in the end I factory reset the ARC as well which helped to get the Era100s to work - because they got the blinking green LED just after pairing with the ARC. So that works atm.
The crashing of the Android app still remains and I cannot add my Sub. I uninstalled the app, I cleared the cache, I reset my router, I restarted my phone, I reset the SUB (and the ARC). Nothing helps. Weird, right?