0. ALWAYS PROVIDE INFORMATION ABOUT MODLOADER (Fabric / Forge) AND MOD VERSION (For Example 1.19.2-8.2.10)

I'm using a fabric modloader version 0.16.14
mod version is 10.4.13

1. Describe the bug
   I'm trying to play Minecraft version 1.21.4 with a few other mods but every time I try using this mod with it, it lags. Half the time I lag so much my game crashes. It sucks because I've always loved this mod. My system isn't the problem, and I tried to see if it was caused by another mod, but it still crashes with the mod by itself.

2. Write steps to reproduce the bug
   Just opening a world with the mod and walking around for a bit. It gets much worse when you're loading new chunks.

3. What is expected behavior
   Not having unbearable lag? ToT

4. Screenshots (If applicable)

Not sure if it'll help but here are the other mods I tried to play with.

3d-Skin-Layers [1.7.5]
AppleSkin [3.0.6+mc1.21.3]
Architectury [15.0.3]
Armor Trim Effects [1.0.4]
Cardinal Components API [6.2.2]
Carry On [2.3.0]
Cloth Config v17 [17.0.144]
Collective [8.3]
CoroUtil [1.21.4-1.3.8]
EntityCulling [1.7.4]
Fabric API [0.119.3+1.21.4]
Fabric Language Kotlin [1.13.3+kotlin.2.1.21]
Falling Leaves [1.17.0]
FallingTree [1.21.4.11]
Freecam [1.3.2+mc1.21.4]
Infinite Trading [4.6]
Iris [1.8.8+mc1.21.4]
Jade [17.2.2+fabric]
LambDynamicLights [4.1.3+1.21.4]
M.R.U [1.0.17+1.21.5+fabric]
More Culling [1.2.10]
Paladin's Furniture [1.4.2]
Particle Rain [3.3.3]
Roughly Enough Items [18.0.804]
Silk (All modules) [1.11.0]
Sit [1.21.3-29]
Sodium [0.6.13+mc1.21.4]
Sounds [2.4.11+1.21.4+fabric]
Terralith [2.5.8]
Tool Trims Packaged [2.3.0]
Trade Cycling [1.21.4-1.0.18]
Traveler's Backpack [10.4.13]
Veinminer [2.4.2]
What Are They Up To [1.21.4-1.2.5]
Xaero's Minimap [25.2.6]
Xaero's World Map [1.39.9]
YUNG's API [1.21.4-Fabric-5.4.0]
YetAnotherConfigLib [3.6.6+1.21.4-fabric]
essential-container [1.0.0]

So, removing Traveler's Backpack fixes the lags? Does the console print any info? Do you have backpack in use when experiencing lags?