Version Info

• Minecraft, 1.12.2 Forge 14.23.5.2860
• Rechiseled, 1.1.0
• Fusion, 1.0.0

Steps to Reproduce
Start Minecraft, crash while loading

Crash report (~/logs/latest.log)
latest.log
crash-2023-06-20_16.40.50-client.txt

It works fine with just Fusion installed.
You are using a lot of other mods, please narrow down the mods needed to reproduce the issue.