I'm having the same problem. I loaded the game, created a character and played for a few hours. Saved game then came back later and it wouldn't launch. So I changed to dirct x 11 and it still wouldn't launch. Loaded from bg3_dv11 exe and the game started. I played for a few hours, paused the game came back to a not responding screen and I haven't been able to launch the game since. Is there a way we can get Larian to address this issue?