I can't start version 1.12.2, I can only run the latest snapshot (18w11a). I've tried running 1.12.1 also but no luck. My drivers are also up to date, and I reinstalled minecraft earlier and had the same result.

MC-127650 Cannot run 1.12.2. The only version I can run is the latest snapshot. I've tried other versions, and reinstalling the game, I've had no luck. Resolved