[Plugin: Ninja Forms Lite] CSS Issue with Processing Box

Hopefully this will be a quick fix. I have everything squared away with my submission form on: http://injurylifeboat.com/blog

The only remaining issue is that, for whatever reason, the box that I presume is supposed to appear behind the processing popup text does not appear.

Any help with this issue would be MUCH appreciated…

http://ww.wp.xz.cn/extend/plugins/ninja-forms/