I had a similar problem after updating UO Tiara. Dunbarton's mini map wouldn't load at all, but it worked fine after I picked out a few folders from the data folder. I also removed the Minimap.xml (or something similar). Unsure what it was though. I didn't try too hard.
Edit: I fixed my problem with it. It was "minimapinfo.english.txt" within the data/xml and data/local/xml
minimap.english.txt was removed from uo tiara a few versions ago, since i now use the real names of the latest maps
Section "empty mod146" MOD146
so the fact you still had it means you skipped the first questions in the installation to delete your data folder, which everyone should do.
Edit:
i believe it's a missing button for composer which we might not get here according to
but i'm going to try to enable it's boolean and gfCircleBoreadaeBoann to see if we can get it.