Could you please try with all other plugins deactivated and a standard theme (like ‘twenty twenty’)? If you still don’t see the map, you can contact me directly and send a login. If you do see the map, reactivate one by one to find the conflict.
You’re right – there were some things messed up in my WP in general 😛. I fixed it and now it’s working.
But there is maybe another issue: A map is shown on category and term page. Is this because the posts have maps attached, too? To hide them I used the “hide Widget” feature of WP. But maybe this is something to solve in an new requirement for Mappress, as well?