When reporting an issue, please try to reproduce the issue with just Dominos and Dominos_Config running. Dominos reuses a good chunk of the stock UI, and other popular addons, like Move Anything, like to take control of those parts, too.

Addon Version
You can get this via running /dominos version in game

World of Warcraft Version
Mists of Pandaria Classic (beta)

I get a few of these during normal gameplay

1x [ADDON_ACTION_BLOCKED] AddOn 'Dominos' tried to call the protected function 'SecureStateDriverManager:SetAttribute()'.

Addon function doesn't seem to be affected (in any way I noticed anyway) but I thought it might be useful to know.

Might be related to that, I got this error message in dungeon run when these happened:

Incinerate don't want to be casted 2 times in a row:
https://www.youtube.com/watch?v=qJ7A4e08u-Y

Rain of Fire / Shadowfury can't be casted while I have target selected:
https://www.youtube.com/watch?v=8YRN0u9K-ss

Might be only Incinerate one, didn't get any errors on run with only rain bug present.