Right, so from what I can tell, the mod uses some of the DLC as a base. You can tell which one from the icons. For example, Ayane uses her ninja costume from the pre-order DLC as a "base", while Mila her Aloha Pack bikini.
As such, I can only assume the game has no idea what it's supposed to read and just crashes, so you basically must have some of the existing DLC in order to be able to use the mod.
This is entirely my assumption and I have no idea if this is actual cause of the crashing or not, but the game doesn't crash for me and I do have all the released DLC so far.