I am not using performance mods.

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Description

I attempted to load the game, it crashed on enqueue_imc. Both server side and client side.

Mod Version

6.0.3

Forge Version

1.20.1 - Forge 47.4.0

Link to Crash Log

https://pastebin.com/46BuNPnN

Screenshot (if available)

N/A

How to reproduce

N/A

Seems to be a bug with Carry on Compat. Correct me if I am wrong.

This is an issue with the "add-on" mod, Compact Expansion. That mod hacks into the room size enum and expands the room sizes without properly cleaning up after itself.. which is why the "getBySize" bit is breaking. The sizes it's looking for don't exist.

This kind of thing was solved first-party via the room templates system in CM7 (where modpacks can just make new rooms via datapack definitions). If you need bigger rooms, I'd consider trying to upgrade.