https://pastebin.com/yqnCRanP

Happened when I tried to view my inventory in survival. Using stable_32 mappings.

Did you manage to solve this?

I just tried the 1.12 version of baubles in my dev environment and works just fine, i used deobfCompile though.
I'm using the curseforge maven for this: (this should work for 1.11.2)

repositories {
    maven { url = "https://minecraft.curseforge.com/api/maven/" }
}

dependencies {
    deobfCompile "baubles:Baubles:1.11:1.4.6"
}

Use 1.12 instead of 1.11 if you want to target MC 1.12 (and change the version for the mod)

then run setupDecompWorkspace + IDE setup and you are fine (re-import build.gradle, idea task, genIntellijRuns task or whatever else you used to setup the project :) )

It's an issue relating to stable_32 mappings on 1.11.2. Baubles needs to update onto the mappings stable_32, and fix the minor issues it has, as it is calling for things that were changed on those mappings. This issue is persistent.

Its working just fine for my 1.11.2 dev workspace (using stable_32 mappings, forge 13.20.1.2425). Are you using the latest forge version?

No.

Alright, I'll check now, I've switched the forge version to a newer one, I was using 2388.

I'll switch the forge version soon, the other coder does not like it when I switch forge versions randomly. Maybe that'll fix this.