Today the Freeview online guide is showing no channels at all.
I've found often with technology, if something happens over the weekend, the situation doesn't get fixed as you think it should. I suspect this is because there's only a skeleton crew available to handle problems.
If you need a TV guide the guide in the TV appears to be working. In addition you may wish to try another site such as https://au.tv.yahoo.com/tv-guide/.