Knife-spec v 1.0.0

Hello everyone.

Im new to coding, and Im trying to create a geoportal using Geoshape. Unfortunately, Ive reached my limit. During installation, Im getting a 'knife-spec 1.0.0 cannot be found in any repository'.

I have tried searching for it manually but knife-spec seems to be pulled from everywhere. I literally cant find it. Is there a work around?