Good afternoon and thank you for posting on the Final Fantasy XIV Technical Support Forums.

This looks like a driver crash (although the question marks are pretty unusual). You stated this happened once, has it happened again since you posted this? Has anything updated/changed on your PC that coincides with this?

If it starts happening more frequently, try updating your graphics card drivers (if you have not already) and disable any overlays and other programs running while playing the game.

Let us know if there are any updates or changes to your issue.

We hope we can be of assistance in helping you enjoy the exciting world of Final Fantasy XIV!