LUSTERLINK'S PROFILE

Hey everyone, this is my first time using this website and I only got rpgmaker MV a few days ago. I immediately wanted to get into harder things and did parallax mapping/overlays. I have finished after a day of working on it, however my overlay won't work and it says an "undefined" is needed. If I get a picture and title it as undefined it works, however my overlay doesn't. Sorry if that was confusing, but if anybody could help that would be great.

-LusterLink