Actual Behavior

When trying to pregenerate a world using the previewer, the pregenerator crashes. When trying to pregenerate when inside the world, the command won't work

Version of Minecraft, version of Animania, Single Player or Server

The newest Animania Base for 1.12.2 single player

Crash log, latest.log

crash-2020-05-20_17.17.28-client.txt

that happens to me too, once I create a new world.
it just somehow crash with 「Exception ticking world」or「No OpenGL context found」

same use newest Animania & CraftStudio, Forge is 2854, single player

Does this error occur without optifine?

right, I only use Animania& CraftStudio, no Optifine.

but it crash almost 3 second after open the world&preview

@GoldenGod48 does this error occur for you without optifine?

I'm going to need more info for this. Can you produce a crash for this that does not have optifine installed? Please send me that log.