When

Loading world using Embeddium with latest beta

Crash report

crash-2024-07-30_12.41.39-client.txt

Latest log
latest.log

Did you try remove leawind's third person and see if it crash?

java.lang.NoSuchMethodError: 'net.minecraft.world.phys.Vec3 net.minecraft.client.Camera.getPosition()'
	at net.minecraft.client.renderer.LevelRenderer.handler$fof000$irisflw$renderLayerTail(LevelRenderer.java:3610) ~[client-1.20.1-20230612.114412-srg.jar%23676!/:?] {re:mixin,pl:accesstransformer:B,pl:connector_pre_launch:A,pl:runtimedistcleaner:A,re:classloading,pl:accesstransformer:B,pl:mixin:A,pl:connector_pre_launch:A,pl:runtimedistcleaner:A}

It looks like the same problem as leon-o/iris-flw-compat#140

And that guy is not using Leawind's Third Person
So I think it's not my bug.