Netatmo Weather NWS01-EC station doesn't reconnect via App

I have a weather station from 2017 - https://www.amazon.de/dp/B0098MGWA8
I didn't use it for a longtime - now I want to reconnect it via app.
The app finds the base station, but then the app shows "select accesories" ("Zubehör auswählen") and waits and waits with no selection possibility. So the reconnect and refreshing the sttings doesn't work.

What could I do? Is the weather station to old?