did you also try to reset your configs if not

    1. Exit out of Wow Completely
    2. 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
    3. 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