Hello MasterPuppet! I appreciate added a mesh to the FBX animations, after giving this a try. It still doesnt working, after checking it seems the naming isn't matching and there are extra bones or fewer bones between the animation and the meshes which are causing issues
So do you think adding the character's FBX without animations will help? because all of the tutorials I've seen on importing say you need the unanimated character to import them.
I think either. but importantly the bone names of the FBX character need to match the bone names of the animation skeleton. Are you able to test importing them into unreal engine?