Our website here: http://www.forager.org.uk

The MailChimp pop-up 'Sign up to our mailing list' will not go away - we cannot find it in modules or elsewhere. Our programmer has suggested it is in the slider: maybe in the second or third slide as I didn't find it in the admin area. I think the pop-up is set when the 2/3 slide appears.

We did update our Joomla recently.

Has anyone encountered this problem or suggest a fix?

Edition: Joomla! 3.8.13

Many thanks
Joel.