Frozen Throne Gate Model Issues

[AnyNameYouWish]

Does anyone know what's up with this model? I've done just texture change edits (to other ingame textures) and adding a portrait camera like I've done with heaps of other models, and not only does it not show up in the editor or in game, but when I did somehow get a version that showed up in the sanity checker, it said the portrait camera doesn't exist- and then I got different animations, with the node manager loses the particle emitters and the animations become different. I have no idea why, these are basic edits with no custom textures. Replacing the texture of the spiders works in the editor.

Here are my attempts. Even just adding a portrait camera didn't work. Is it something I did, or is the model just fucky?