VPN - Yes, ExpressVPN. Have tried the program with and without it running, and I am running the latest version.
Network connection is hard wired to ISP, and yes I have tried restarting the router. ISP is Cox Communications in the Los Angeles, CA, area.
Platform - Windows 11 Home 23H2. I have already performed a clean installation of Windows 11 from DVD, and it hasn't helped.
Issue occurs with multiple character. There is no pattern as to when the crash occurs. I could be just chilling inside the Saucer or in the middle of running a dungeon or raid. The issue was occurring two or three times within a two hour window before I performed the clean install of Windows 11. Since then it has happened once in about three hours of play.
Restore Game Data is the built-in feature of the launcher to rebuild a suspected corrupted client installation of FFXIV, no?