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Are you sure your game is version 3.1?!
Can you tell me if you have the file B8217BE7-F4E5-4928-9442-F483209F129B in bin\animations\B8217BE7-F4E5-4928-9442-F483209F129B (the data.pak file) and what its size is?!
The game is that version, but the file is missing... Maybe I accidentally deleted it.
Sorry, I found it! I didn't notice it right away in all this... 152 KB
I opened it in the editor, and the skeleton seems normal.
Added after 14 minutes
Could you share yours, just out of curiosity!
Added after 2 minutes
For cases like this, and for others, I would recommend creating models as a patch (and with a different name, so as not to get confused), which doesn't contain any unchanged files from the original mod. Like NHF_E to NHF, for example.
Install the mod, install the patch - and voila!
Added after 1 hour 47 minutes
....I reinstalled the game, and everything is fine. Just for fun, I added the old bin, and everything is fine too. I still don't understand what caused the problem....The only bad thing is that I have to reconfigure the map editor again(((