ADs appear as blank white boxes in my footer bar

Hi, i am using colormag theme if that makes a difference, but my ads on sidebar works perfectly,but when it comes to an AD on the footer bar, it becomes a blank white bar. https://www.droidfeed.net is the site, if you scroll all the way down to the bottom of the footer, you will see a white box, which was supposed to be the Google Adsense AD. Is there a specific problem causing this? Or are ads not meant to be located in the footer?