“Unfortunately, your country location RUSSIA has been blocked by the admin..

Error:
“Unfortunately, your country location RUSSIA has been blocked by the administrator”

I get this error sprodically on certain pages. Deleting the cache makes them accessibly again, only to see the error a few hours later again.

It is on random pages on my site. I disabled the plugin and it was ok, but with activated cache I get these lockout messages. Some customers vomplained already, so I now keep it disabled.

If I re-enable it all is fine, a few hours later certain pages are blocked again.

Any idea?