We run Orange with our students and most of them have problems with running the Geo Map widget. It does not show any background map. In the bottom an error message is displayed: "Cannot fetch map from the Internet. Displaying only cached parts."
I have found this Github page, but it does not tell how to update or add any JSON files that might be missing: https://github.com/biolab/orange3-geo/blob/master/CONTRIBUTING.md
What to do to have the background maps back again in the Geo Map widget?