Game crash when opening/creating a world with Yung's API and twilight forest installed

[Jakoby1835]

NeoForge Version

20.4.237

Twilight Forest Version

4.4.2276

Client Log

https://gist.github.com/Jakoby1835/7fb589d1fa0d8fa67f82f34c393e74d3

Crash Report (if applicable)

https://gist.github.com/Jakoby1835/ed0c784205790e4b95410e3d506dbb26

Steps to Reproduce

1. install yung's api and twilight forest in neo forge
2. launch the game
3. open / create a world

then get: The game crashed whilst exception initializing level Error: java.lang.NullPointerException: Cannot invoke "it.unimi.dsi.fastutil.objects.ObjectListIterator.hasNext()" because "customDensities" is null

What You Expected

that the world would load an not crash

What Happened Instead

the game crashed

Additional Details

I tried it with all 1.20.4 twilight builds and it happend with all of them. both mods run fine separately but when loaded together their produce this crash.

Please Read and Confirm The Following

• [X] I have confirmed this bug can be replicated without the use of Optifine.
• [X] I have confirmed the details provided in this report are concise as possible and does not contained vague information (ie. Versions are properly recorded, answers to questions are clear).
• [X] I have confirmed this issue is unique and has not been reported already.

[GizmoTheMoonPig]

this has been fixed in future MC versions. Unfortunately we don't have a workable branch on 1.20.4 so going and getting this fixed is more hassle than it's worth. I would recommend removing either mod for now or updating to 1.20.6/1.21 (note, we haven't made a release for 1.21 yet but have playable dev builds over on our discord if you're interested)