MMOMinion

Before the 3.5 patch I could load the FF14 launcher, log in with 1st account and click play, load another FF14 launch, log in with 2nd account and click play, etc., until I had all 4 accounts up and running (at which point I'd attach the bots).

After the 3.5 patch after 2 instances of the game are running, loading the launcher and clicking play just crashes the would-be 3rd instance with no error message.

Does anyone know what's going on here or how to fix it so I can run more than 2 instances of FF14 again?

AFAIK, XIV had a 2 instance limit since launch, and you needed minion to launch more than 2. Maybe that changed/got dropped at some point, but even as recently as the free login campaign, I could not log into more that 2 without minion.

Attach to one or more games before launching #3 and it should work.