This is related to our Limited programatic ad plan. Unfortunately you’ll need to acknowledge this in each browser you use. But once it’s acknowledged, you shouldn’t see this popup anymore.
Since I’m in California, I get a cookies popup that looks like this:
Hitting “OK” clears it permanently for me, but “Settings” or “X” just clears it until I reload the page. And as you say, nothing happens when I review settings.
I’m checking with our developers now.