Website marked as offline in monitoring and the Hub

Hi, all my website on Siteground are shown as offline but work fine. That is not a problem.

But one website was recently (last month) moved to my new hosting where all the websites on that new host work fine. Unfortunately the website migrated from Siteground is still showing as offline – http://www.puffininsulation.co.uk.

Can't think why (transfer was a file and db transfer, not cpanel transfer so setting should have not been transferred.

Anything I should be checking?

Cheers,

Paul.