[20Sep2023 01:49:50.639] [Server thread/ERROR] [net.minecraftforge.eventbus.EventBus/EVENTBUS]: Exception caught during firing event: Cannot invoke "net.minecraft.world.damagesource.DamageSource.m_19360_()" because "data.source" is null
java.lang.NullPointerException: Cannot invoke "net.minecraft.world.damagesource.DamageSource.m_19360_()" because "data.source" is null
1277 | at TRANSFORMER/[email protected]/com.majruszsenchantments.enchantments.HunterEnchantment$Modifier.lambda$new$0(HunterEnchantment.java:39)

Hello, thanks for the report, it was fixed with the latest 1.10.0 release