Hello again! mlundblad mentioned to me on IRC that he has identified the culprit as gjs in testing not being new enough. Please confirm that upgrading to gjs from unstable fixes the problem for you.
(This issue has been fixed upstream in gnome-maps at: https://git.gnome.org/browse/gnome-maps/commit/?id=f735490a47afbf and I'll add the equivalent dependency to the debian package shortly.) Regards, Andreas Henriksson
