Crashed when with ConfigurationsBackport and (Loot++, Waila or PotionCore)

[AsgoreChara666]

Minecraft version: 1.8.9
Forge version: 11.15.1.2318
Java version: Temurin jre8u482-b08 20260205

Mods:

Aoneconfigbootstrap-1.8.9-forge-1.0.3.jar
ConfigurationsBackport-1.8.9-1.1.jar
PolyPatcher-1.8.9-forge-1.10.3.jar
PotionCore-1.3_for_1.8.9.jar

Issue: My game will crash when with this mod, ConfigurationsBackport and (Loot++, Waila or PotionCore)
Crash reports: crash-2026-05-01_18.07.58-client.txt