Script error in launcher after patch update

[Enkidoh]

I had the same issue you did, and like you the launcher still wouldn't work even after clearing IE's cache etc. After some searching back through the forum, I discovered the solution to my problem was to go to the My Documents folder, and then 'My Games' and 'Final Fantasy A Realm Reborn'.

In the FFXIV ARR folder found in My Documents/My Games, click on the ffxivboot.cfg file (it should open as a text document in Notepad), and carefully change the number after the 'Browser type' entry to '2' (for me it was set as 0, which was a giveaway something was wrong with it). Then click File, and then Save. The FFXIV launcher should now work.