Getting ad-spammed all day long

Thank you for your feedback.

How do I deactivate the backend popups?

If you are referring to the ads. You can dismiss it. If it is not dismissing, can you let us know your host provider?

Possible that your host may have object caching enabled.

You are right… it is not a popup but an ad:
What I mean is this:
https://de.share-your-photo.com/1440880a10

When I click the x in the right corner, it is coming over and over again as soon I open another page in the backend.

How do I deactivate it?

Hello,

This is not our plugin. You should contact the correct plugin author/support: https://www.ads-software.com/plugins/responsive-coming-soon/

I’m very sorry.

No problem.