Minecraft keeps crashing when I try to use marlow's crystal optimizer mod for some reason

[basementdweller1]

Minecraft Logs

https://gist.github.com/basementdweller1/6967db9bc62491dcd3d5316d131e0947

Description

I was trying to use a mod which was marlow's crystal optimizer but when i launch minecraft it crashes. i tried removing the mod and my minecraft works completely find without it. i have also tried removing every other mod except for marlow's crystal optimizer but it still crashed. i need help to fix this

[Poopooracoocoo]

The version you got is not for 1.21.4.

[basementdweller1]

oh it seems that it doesnt have a version thats for 1.21.4 so i switched to 1.21 and it worked perfectly. thanks man

[Poopooracoocoo]

You should be using the hotfix, 1.21.1, instead of 1.21.