I don't get it. When I click on "Use This Photo", it always says, "Couldn’t detect any faces. Please verify that the image is valid and less than 3MB." When I t

I don't get it. When I click on "Use This Photo", it always says, "Couldn’t detect any faces. Please verify that the image is valid and less than 3MB." When I type anything in the search box, it always says, "Oops, something went wrong. Please try searching again." Just what am I supposed to be doing on this page?