version v1.1.1

crash-report:
crash-2022-08-29_00.10.58-fml.txt

config:
fallback_compatibility.txt

This corrupt JSON causes your crash BTW.
I will fix the crash side, but you have to make a valid JSON for fallback compatibility.

Failure message: Better Combat (bettercombat) has failed to load correctly

Are you using some kind of mod that is trying to accelerate the launch procedure of the game?

Failure message: Better Combat (bettercombat) has failed to load correctly

Are you using some kind of mod that is trying to accelerate the launch procedure of the game?

I use this:
https://www.curseforge.com/minecraft/mc-mods/smooth-boot-reloaded

maybe your mod and this is not compatible?

I have never tested it, its most likely not compatible.
Please try without it, report back.

By the way, your fallback config is corrupted.
item_id_regex accepts a single string value.
So instead this:
"sweater:mythril_sword", "sweater:soul_steel_sword", "tconstruct:sword", "twilightforest:fiery_sword", "twilightforest:ice_sword", "twilightforest:ironwood_sword", "twilightforest:knightmetal_sword", "twilightforest:steeleaf_sword"

Use this:
"sweater:mythril_sword|sweater:soul_steel_sword|tconstruct:sword|twilightforest:fiery_sword|twilightforest:ice_sword|twilightforest:ironwood_sword|twilightforest:knightmetal_sword|twilightforest:steeleaf_sword"

This corrupt JSON causes your crash BTW. I will fix the crash side, but you have to make a valid JSON for fallback compatibility.

had no idea, thank you so much!