Do not download this add on as if you do then you will no longer be able to play ffxiv, the only fix is to re-install the game and leave the add-on unchecked. The error message you will receive is "unable to complete version check [20458][24530][20457][404]".
Next time SE make sure that we are unable to even use the codes in the PSN store until the actual download works and doesn't mess with console players ability to play the game.