Hello fellow Medieval 1212 fans; amazing mod isn´t it`? I love it.

Its worked more or less flawlessly for me, up until now when I had not started the game for half a year or so.

Suddenly I got this:

Some of the .packs are out of order.

Well, they aren´t; they are in the same order they have always been.
If I try to re-arrange, it doesn´t work either. If I unselect something it just says that that particular thing is missing.

I can get the game started and load up a new campaign if I deactivate the 4th graphic modpack.

Does anybody have an idea why this is or how to fix this?
Is this a known issue?