The GOTM page for this one says (in the body) that the save is supposed to be played with BtS version 3.17 and HoF Mod 3.17.something. This might comfuse some who do not notice the red text saying we have to use the 3.19 BtS patch and the Buffy Mod.
Yeah, several people have pointed that out - Alan has fixed it now. (It took a while because it was automatically generated text, so fixing was slightly more complicated than might be expected). It is of course the 3.19 BtS patch and the Buffy mod you need.