Thank you; that does help. I am really sorry about that error... I thought I'd found out what was causing it and fixed it, but obviously not.

If anyone runs into it and still has Freeciv installed, I would really appreciate it if you could do this in a terminal:
dpkg --get-selections > /home/user/MyDocs/.documents/installed-software

... and attach or send me the installed-software file it creates.(It's a list of all the packages you have installed.) I was able to reproduce this earlier after reflashing, but not anymore; it may be a package causing the problem or a lack of one... or something else entirely.

(And a belated "you're welcome" to mannakiosk. Thank you for posting quickly when you had a problem!)