Error in GUI XML Files

[Eldeberon]

Had the same problem.

It was caused when I updated the patch. Instead of opening the unifies folder (that came in the patch) and dragging the contents into the existing unifiles folder, I just dragged the folder. This appeared to replace the whole folder deleting the original files that were needed but not being updated with the patch.

As a result the game could not find the old UI "default" files, because they were gone.

HOW I FIXED IT

There is a "Default-Old" folder in "unifies" which comes with the basic game and which I did not update. I simply renamed it to "default" and the game ran fine, albeit with a slightly different UI than before.

Using that default I was able to rebuild my old UI folders.

Hope this helps.