I think It's a problem with a game itself, nothing to do with mod or a patch.
I suppose that xxxxxxx.jpg was a placeholder when Luxee was copy-pasting structures for gallery and forgot to replace that one. There are two instances of this.
I'm not getting the error myself, so I cannot confirm this, but I think this should fix it (gallery mod should also fix that, so If you have that mod and getting that error then I'm completely wrong ).
Edit: Yea, that fixes it. Error appers only when you have one of those two scenes locked.