Recently (namely last night and today, although it has happened in the not too distant past before), I've been getting an error popup with the message:

"An unexpected error has occured. Exiting FINAL FANTASY XIV.(17)".

It just started happening kind of out of the blue, completely crashing my game while running around places. Like the previous time I had this issue, I reinstalled the game completely, although quite honestly, that might have made the issue worse, as now I crash about 30 seconds after pressing 'play' on the launcher without even getting to the title screen AND I'm still getting the error message that I did before.

This is on the PC version of the game, on Windows 10.