Both WikiJourney apps in unuseable state

Both WikiJourney apps https://f-droid.org/de/packages/com.wikijourney.wikijourney/ and https://f-droid.org/de/packages/eu.wikijourney.wikijourney/ are totally broken right now since the backend they are using seems to be too, because also the WikiJourney website https://www.wikijourney.eu/ suffers the same problem. The corresponding GitHub and Twitter accounts show no activity, too.

I don't know yet what F-Droid's standard practice is with apps in a state like this but for users it's frustrating to have broken apps in the main repository.