Describe what you were doing before the crash

The game crashes when the "create new world" screen is opened.

To Reproduce

Steps to reproduce the behavior (if possible):

1. Start Game
2. Create new world

Crash Log (REQUIRED)

crash-2022-06-10_20.35.13-client.txt

Versions

• Minecraft Version: 1.19
• Architectury API Version: 5.6.22
• Platform (Forge/Fabric): Fabric
• Fabric Version: 0.14.7
• Fabric Loader Version: 0.11.0
• Fabric API Version: 0.55.3
• Mod Version: 11.0.6

Additional context

This crash report makes no sense, there is likely another mod at play in this crash.

Try this without BetterNether/BetterEnd and BCLib. It appears they have a mixin targeting the errored class. If this resolves it, I'd suggest opening an issue on the BCLib GitHub.

Even without BCLib it crashes.
The modlist in the crash report works fine Better Animals disabled.

BetterNether/BetterEnd and BCLib and Better Animals in it's own modpack works fine.
So it must an incompatibility between Better Animals and some other mod in that list.
I'll try if i can figure out which one it is.

Minimal setup to reproduce:

• architectury-5.6.22.jar
• betteranimalsplus-1.19-11.0.6-fabric.jar
• thonkutil-2.15.2+1.19.jar

I am having the same issue as well i looked around and people are saying has something to so with the architectury mod. seems like any mod that adds new mobs to the game is causing this issue.

Well I'm using BetterNether, it adds new mobs to the game but it does not crash the game.

I've found the issue: ThonkUtil adds to tags directly via a mixin, but doesn't create a new tag object when the tag is null

This explains the crash well
LimeAppleBoat/ThonkUtil#21

Issue fixed with the closure of LimeAppleBoat/ThonkUtil#21