Hi all, first post here but in case anyone else is experiencing this issue, I'd suggest checking if you are trying to use plain old http: instead of shiny yummy https:
While taking my first test site out for its first spin in the wild I noticed this message, then immediately after visiting this post realized I hadn't yet enforced https on the site.
As soon as I used https instead, the popups disappeared, and as soon as I switched back to http there they were again.
Naturally can't say for sure what anyone else is experiencing, but it surely worked for me.
