Hello,
A couple of weeks ago I bought the Popover extension. Here https://www.seblod.com/store/extensions/19159 they warn that: if you can not see the popover box, you could have an overflow: hidden; conflict in your CSS. To work around this you can enter "body" in the "Container" field. I can see the popover box but no fields are displayed inside, it doesn't matter what settings I choose for the content.
Thanks