It happened now and then some months ago, but this happens very often since 6.0.
Windows 11 Pro (all updated), it very often happens when I use log out and end the game:
An unexpected error has occurred. Exiting FINAL FANTASY XIV.
(date)
Followed by some lines like
ffxiv_dx.exe+3CE98D
ffxiv_dx.exe+438252
I wish I could upload my screenshot here. But can't, without previously uploading somewhere else....
This doesn't help me to help you understand the error :-/