I know this is a bit of a necro, but I'm having this problem now, a year on. I know it's not the same fix, because my user profile is under Shiny; all latin, ascii characters.
I'm including the ufoconsole.log for you below. I got into this game aaaaages ago, just got re-into it when I found it had gone up a version number, but I've never had much luck with it. When I downloaded this recently I could play normally, and did so for a little while, and then a terror mission on the Houston underground appeared, and now the game won't let me play a mission, even on a new campaign.