I have been experiencing this problem since Sunday morning [17 December 2017]. No problems whatsoever previously (including Saturday). Have brought Nvidia drivers up to latest version, have also installed latest updates for Windows 10. Have ALSO totally removed and re-installed the FFXIV game files.

Still getting errors. Downgrading to Direct X 9 works, but is painful to look at on 32" monitor, so this is not a solution I want to have to deal with long-range.

Don't understand why this occurred so suddenly between the 16th and 17th of this month.