Genesis - Footer widgets aren't appearing

If you're using the three-column footer in your theme, there are three widget areas for each "column" of the footer, as shown below:

For the footer to display, you'll need to have a widget in  EACH of the three widget areas. If one of the footer widget areas is empty, the entire footer won't display. So if your footer isn't appearing, check to be sure there is a widget in each area.