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

1.20.1-FORGE

Moonlight Lib Version

1.20-2.13.49

Describe the Issue

Crash on world load referencing an issue with a creative tab icon stack and Randomium. I have 549 mods, so going through and finding the offender might take a bit.

Log Attachment

latest.log

crash-2025-01-14_09.35.16-server.txt

OPTIONAL: To Produce

1. Install Moonlight and Randomium
2. Load a world

OPTIONAL: Which mods are affected?

Randomium 1.20-1.32

I'm not seeing this anymore after updating a whole bunch of mods in the pack.

That's good. that should be fixed in v2.13.50

Try without ramdomium and open creative tab. What I see there is a mod that is adding an item to creative tab with size not 1, likely air item. Could be caused by a mod breaking the block item map (you can verify that by middle clicking many blocks like banners and see if they give you stuff)