SWELOT
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Unfortunately, I'm afraid I'm powerless here. It's probably an incompatibility with some other mod.
Added 3 minutes later
What an interesting bug, I haven't seen anything like this before. I'll take a look and see what I can do.
I have an idea - the map is packed in a WinRAR archive, and this archive has a bad habit of corrupting files. For example, one of the RTF updates was packed in WinRAR, and I was flooded with messages about bugs - here the texture is missing, there the model has disappeared, here the mod doesn't work. Try unpacking the map using 7zip, it might help. Well, I'm off to hunt for the bug.