I've installed the Construction theme as a foundation for a site I'm working on. I'm not using much of the Construction styling, but like to do this so I have a head start on things.

I've run into a problem, though. I don't want the footer or copyright bands to be "fixed". So I've gone into the Layout area, clicked on the Footer "gear", clicked on the second tab, and deleted the "fixed footer" CSS class.

However, when I try to Apply or Apply and Save, I get an error saying I have to fill in something on the width. I also see that the variables for the minimum and maximum are not filled in.

When I put "100" in the blank and hit either Apply or Apply and Save, I get a spinning wheel and it doesn't do anything. I can click away to another tab, or can cancel the process, but I can't get it to complete.

I've attached a screen grab of the window so you can see what is happening.

Do you have any idea of what could be causing this?