crash-2020-07-05_02.31.59-server.txt
Environment

• MixinBootstrap version: 1.15.2
• Forge version: 1.15.2 - 31.2.9
• Minecraft version: 1.15.2
• Java version: java 8
• Mods: biomesoplenty, dragon mounts,kiwibirds,jei, quark,journeymap,mrclayfish furniture,xaeros minimap,skye'sbakery,bonsaitrees,productive bees,pandoras creatures,aquaculture,druidcraft,improved wolves,venture,sleepingdogs,autoreglib,libnonymous,

Issue Description

Minecraft crashes when click on start playing world.

crash-2020-07-05_02.31.59-server.txt

Looks like an issue with OptiForge.

Looking at OptiForge on CurseForge it states that OptiFine pre30 requires OptiForge v0.1.27 and Forge v31.2.23. So update those mods and see if it fixes the issue.