Just started crashing for me today as well, except I'll sometimes I'll manage to log in. I'll crash if I try doing a trust dungeon however. I always get the exact same message, down to the date and time.

An unexpected error has occured. Exiting FINAL FANTASY XIV.
2020-02-10_13:29

ffxiv_dx11.exe+12C28BD
ffxiv_dx11.exe+6161C
ffxiv_dx11.exe+5FCA3
ffxiv_dx11.exe+120EF60
ffxiv_dx11.exe+121060F
ffxiv_dx11.exe+12130C5
ffxiv_dx11.exe+4533EC
ffxiv_dx11.exe+18D012