did you also try to reset your configs if not
- Exit out of Wow Completely
- Go to World of Warcraft > _retail_ and rename the WTF folder to something else, this will reset all your settings for addons, do not delete this folder just rename it to WTF_old or something
- then go back in the game is this fixing the error
did this fix the error if not remove the new WTF folder and rename the old one back