Hello,

This only seems to effect the game after today, I believe there was an update for the launcher and it seems others have this problem also.

I use a modded version of Minecraft (Forge 1.12.2)
I understand that not much help can be done with unofficial versions however this is definitely to do with the new update of the launcher somehow as everything was working yesterday and I have not changed anything. I tested on another unofficial version and it crashes also (Optifine 1.12.2).

I have attached the latest log and also the launcher log. Hopefully you can find the problem.

Thank You!