Why can't I import this Animation in ARK dev kit?

Hello,

I’m working on a Fables mod for ARK (Wolf among us).
I already got the models and an idle animation for the jersey devil, but sometimes it happened that if I import the jersey devil model it says, can’t create asset E:The Wolf among us/Jersey Devil/Jersey Devil. Fbx, this only sometimes happens, but it happens anytime with the animation, the ue4 don’t recognize that it is an animation, if this is important the jersey devil model was an xbs file and I converted it to Fbx, do someone know what I have to do with the animation so I can import it?