CSS selector not working here

Hi,
I’ve got the plugin to work on one page with a different selector. I’ve then added and tried multiple selectors, and can’t seem to get the plugin to work here on this page – http://restaurantsalesgroup.com/
In a responsive view, this is what is showing – http://screencast.com/t/FxMyCw6QXGaz
What would the css selector be?

Thanks.

https://wordpress.org/plugins/matchheight/