1. Disable all of your addons.
2. Log in.
3. If the problem doesn't occur, log out and enable half of your addons. Log in.
4. If the problem doesn't occur, log out and disable the addons you'd enabled, and enable the other half. Log in.
5. Once you've identified that half of the addons causing your problem, disable half of those at a time until the problem goes away.
6. Keep working your way down until disabling just one addon makes the problem go away. That's the addon causing the problem.
If you read the OP second post you will see that this cure you have posted does not work.
I'm having problems with this mod and the Naxx raid. It works anywhere out side the instance. But when I enter that instance, Zomgbuffs will not work. I uninstalled and reinstalled and now im not getting errors. It just does not work. I have a bunch of other mods but I just enabled Zomgbuffs and it still does not work.