I may have had the same problem. I downloaded the full patch and after the install I noticed that all my allied units with regards to the Waterloo Mod turned into blob figures like what you show in your picture.
What happen is all the text files in the C:\HistWarGames\HistWar\Langage\OoB\Modds folder that help run the Mod were overwritten by blank files.
What you need to do is reinstall the Waterloo Mod to get it to run again.
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