I tried playing 1.20.1 in a modded server me and my friends own, unfortunately when i load it up in creative i cannot enter the creative menu and am met with this as the error

Thread: Render thread
Suspected Mod:
Rats (rats), Version: 1.20.1-8.1.1
Issue tracker URL: https://github.com/Alex-the-666/Rats/issues
at TRANSFORMER/[email protected]/com.github.alexthe666.rats.registry.RatsCreativeTabRegistry.registerColoredItems(RatsCreativeTabRegistry.java:367)

	If anyone knows how to fix this, please help

I am having the same problem as well
crash-2024-09-03_21.25.55-client rat.txt

I dont modify stack sizes in the creative inventory, this is another mod causing the problem. It looks like something called "Just Utilities" might be doing it? They arent open source so I cant easily check what their mixin is doing. Try removing that and let me know.
To the person who made the bug report please provide an actual crashlog like this other person did. I cant do anything with what you posted here

Dye Depot is causing this. I've reproduced the crash with nothing but Rats and Dye Depot installed.

This makes quite a bit of sense when you consider that the crash references Rats' colored items.

crash-2024-11-13_00.07.40-client.txt

ok, i can see why it is. That mod is an absolute hack when it comes to adding their own colors and they break like every mod that uses the DyeColor enum. I'll add a safeguard for this but it really shouldnt be something I need to fix