I imported my fbx file again with the T0 as ref pose option on, and I still get the same result (that part in the error message disappears though-the only error message now is about the mesh not being referenced by any hierarchy node). As for the rest, I am not sure how i can check if my verteces are weighted or if my bones are linked because I am quite new to all this and as i said, did not create the rig or mesh :. Could you please explain what that even means or how to fix it?
Thanks! 