I am using the lastest version of your aux and cooldowns addons as of the time writing this. A error box with no text and a okay button appears when i log in with this two addons enabled.

I disabled all my addons and tried them both separately and they do not show the error but when both on together they do.

If i can some how give you more info just ask.

seems one of my other addons was suppressing this. should be fixed now. you'll have to update both aux and cooldowns.