Broken board names URL on TIO?

[Bogeyface]

www.mumsnet.com/Talk/$tr.TopicUrl

Whenever I click on AIBU or chat or whatever from my TIO list, it takes me to the url above, the full board list. This has only started happening in the last couple of hours or so.

[TeenAndTween]

Yup. Me too.

[Sadik]

And me