Describe the bug:
Upon trying to create a new world, my game crashes.

Versions: (BEFORE SUBMITTING A BUG REPORT, make sure you have the most up-to-date versions of Immersive Weathering, Moonlight Lib and Supplementaries)
Minecraft version: 1.20.1
Immersive Weathering version: 1.20.1-2.0.5
Moonlight Lib version: 1.20.2.13.75
Fabric API / QSL / Forge version:
Forge 47.3.33

Other mods:
Noticed the crash only started showing up upon adding Naturalist, Jaden's Nether Delight, Pam's HarvestCraft Mods, and Yung's Cave Biomes. Hadn't gotten this crash before with every other mod installed. I cannot use modern supplementaries cause it crashes.

Logs:
Even if the game does not crash they may be useful!
Please provide the following logs:
From .minecraft/logs : "latest.log" as well as "debug.log" if it exists. From .minecraft : "launcher_log" as well as a
file that starts with "hs_err" if it exists. Note: Double check that the logs are from the correct time. ex, don't give
us a log from a month ago because you forgot to check the date.

latest.log

debug.log

crash-2025-03-16_21.40.53-client.txt

To Reproduce:
Steps to reproduce the behavior. Format it as a numbered list of steps.

1. Start Game
2. Create New World
3. Crash

Expected behavior:
A clear and concise description of what you expected to happen.
I expected the game to allow me to create a new world.

Screenshots:
If applicable, add screenshots to help explain your problem. https://screenshot.help/
Nah.

Additional info:
Add any other information that might be needed.
Nope, but I can tell you it happens as the game prepares to pull up the New World settings after clicking Create New World.

Note: I have tested this with Pam's Mods, Jaden's Nether Expansion Delight, and Yung's Cave Biomes. It appears those are innocent. Naturalist appears to be the main culprit.

I confirm the issue with:
Naturalist 5.0pre1
Immersive weathering 2.0.5
Both Forge 47.3.22 and Forge 47.4.0

Work OK with Naturalist 4.03 and Forge 47.4.0

As Naturalist 5.0pre1 look like a preRelease maybe we need to wait for full release to see if the issue is still here ?
You can play good with Naturalist 4.03 for the moment.