App cannot access network at all

I’ve installed the GLS banking app, setup worked fine, but now the app can’t connect to the internet at all, the webview of the FAQ says “cannot resolve hostname”. The app doesn’t show up in the iode blocker either, that one says the app hasn’t tries to access the Internet a all. The logs don’t show anything from the GLS app itself either. Where else can I go look?

Which GLS Banking app did you install? There are two of the same name and one of them has been discontinued on September 30th as far as I know. You need this one: https://play.google.com/store/apps/details?id=de.gls.banking
Perhaps that’s the problem?

Yes, it’s the new one. I upgraded to the new one a while back as prompted, now I’ve got these issues.