BEFORE CONTINUING:

• Always check you are using the latest version of these mods and its dependencies
• Remove known problematic rendering mods such as Optifine, Sodium and others

Version-Loader

1.21.1-FABRIC

Moonlight Lib Version

moonlight-1.21-2.17.32-fabric

Describe the Issue

When closing or going to the next page of the custom world settings of ReTerraForged (https://github.com/GamingCrew69/ReTerraForged/tree/1.21.1) the game crashes.

Log Attachment

latest.log

OPTIONAL: To Produce

1. Click on create a new world
2. Go into the custom world gen settings
3. Select a preset and press done
4. CTD

OPTIONAL: Which mods are affected?

ReTerraForged

From what I can see they are adding a system and expecting other mods to add compat themselves or crash. Aka their issue. Report there

Hello, RTF Discord moderator here. This has already been fixed in the upcoming update.