I get those error messages sometimes. They usually go away when you do enough things/pass enough time. There likely is something going wrong, its just trivial and not game breaking.
Technically, its actually telling you where the problem is in the txt file, and which entry. But if its not doing anything funny on the screen, let it slide...
Now, if you ever get that darn texture load failure spam on the world map, holy cow laggggg. But even that went away. What can I say? Its a good game, but it has its bug moments.