WotLK Chatframe lua error on DSac maco

[Neric]

/cast Divine Sacrifice
/in 0.2 /script CancelUnitBuff("player","Divine Sacrifice")

now produces this lua error:

1x InterfaceFrameXMLChatFrame.lua:3417: attempt to index field 'header' (a nil value)

I am pretty sure that it worked before. Going back to the standard one, but it's less efficient of course.

/cancelaura Divine Sacrifice
/cast Divine Sacrifice

[Shred]

Have you tried disabling addons?