"A System Error has occurred-2146697211"

Keep getting "A System Error has occurred-2146697211. http://account-gate.square-enix.com/account/content/account-gate/ffxiv-login/index.html?lng=en&rgn=3" when I try to login through the launcher tonight after the update. Didn't have it before todays update. Any idea how to fix this?

For anyone that might encounter this issue in the future, it was temprarily resolved by deleting the data folder for FFXIV in My documents. Make sure to make a backup copy of this folder, and copy paste it back once you get to the green "Play" button, otherwise you'll lose all your configuration. Such as gearsets, macros, HUD layout, and so on.