Buffs and debuffs vanished

[Asyme]

I've probably misclicked something but... All buffs and debuffs recently vanished from my realui setup. I'd noticed this a few days ago but not really bothered with it. Possibly a mistake when I ended up tanking: Not only could I not see my own, but any debuffs on the focus tank had vanished making knowing when to do a swap impossible.

Any ideas what might have happened?