Constantly seeing "Safari can't verify the certificate jobs.mumsnet.com"

[wanderings]

Every single click to another page, this message appears. I'm constantly having to "cancel" it. Is this meant to be happening, and if not, is it possible to change settings to stop it appearing?

Hi there. That does sound a bit annoying. Sorry about this! We'll have a look into it and get back to you to let you know if there's anything we can do as soon as we can.