Hello again. After more than 8 days without a response from any of you, I was able to figure it out on my own.
In version 2025-1, umlauts are missing, so places in Germany (Düsseldorf) or streets containing Ä, Ö, or Ü—as well as countries like Dänemark or Österreich—are not displayed and therefore cannot be selected. All of this happens with the language set to German.
If I switch to English, the countries Danmark und Austria are found, but cities like Düsseldorf are still missing. So it's a matter of adjustment.
I installed Map 2022-1 and same issue, so I installed today Map 2021-1 and, it's working now. In this version, the Ä, Ö, and Ü characters are correctly formatted.
I'm currently running now the 2021 version, but I also want the 2025 and 2026 versions, which are coming out soon. Let's see if I can fix that in the data.