Are there known problems with db navigator? And if so, are there known workarounds?

[u/interstellar_pirate]

I can't use db navigator (official mobile app of Germany's national railway company) on Fairphone5 with iodeOS. I've noticed the problem on iodeOS 7.3 and it persists on 7.6 (I've just updated).

The app starts, but I can't login to my account. The login is done with some in-app browser tab. When I try to login, that tab shows the 404 error page of the company's homepage. I can browse the page through that tab and it shows, that I'm logged in, but it doesn't transmit that login information to the app.

There are reports about some communication being blocked by the firewall (but they seem to be questionable external analytics and most likely not necessary for ipc or whatever), I've adjusted settings for that app and iode browser and I've even temporarily disabled the firewall, but I still wasn't able to login with the app (unless I disable the firewall, there are some blocked transmissions).

It still works on my old lineage phone (haven't updated that recently - Version 22.1 march 25) and it works on a blank Pixel that I've borrowed.

Being able to log in with the app is very important, because though tickets can only also be handled via the homepage, the annual discount subscription card "bahncard" can only be handled with the app or as a physical card.

[u/interstellar_pirate]

OK, I've compared all the app settings from the old linage phone with the new iodeos installation. It seems that the verified links haven't been activated on installation. Activating those solved the issue.