How to remove the white blank space under footer?

First of all, I really thank the maker of this great theme.

My question: how can I remove the white blank space that is under the footer.

Please check

Hi Yazeed,
I found this element while inspect the footer element of your site

I think your plugin made those blank white space under footer site.

Can you help which plugin is it? or how to remove that?

I am not sure, but I found “super cache plugin” in the screenshot