According to your testing, does the issue occur with ONLY Immersive Portals mod installed?

Yes

Forge Version

47.4.0

ImmersivePortals Version

3.0.6

Latest Log

https://gist.github.com/CraftyZombie/302cdf12506366ef1e3ba33d32b96000

Crash Report (if applicable)

https://gist.github.com/CraftyZombie/4418b2324239b12b78af901371def7ec

Steps to Reproduce

1. Install the following mods with Forge 47.4.0 and Minecraft 1.20.1:

• Cloth Config 11.1.136
• Moonlight Lib 1.20-2.13.73
• Heartstone 1.3.0
• Immersive Portals 3.0.6

2. Launch the game.
3. Crash.

What You Expected

I expected the game to load.

What Happened Instead

The game crashed.

Additional Details

Does not occur with Fabric Immersive Portals and Heartstone on Fabric.

Please Read and Confirm The Following

• I have confirmed this bug can be replicated without the use of Optifine.
• I have confirmed the details provided in this report are concise as possible and does not contained vague information (ie. Versions are properly recorded, answers to questions are clear).
• I have confirmed this does not happen on the fabric version (If it does please report to here instead).
• I have confirmed I'm not using a hybrid server (Magma, Cauldron) or a different (non official) Forge Server release.
• I have confirmed this issue is unique and has not been reported already.

I apologize, when I put "No" earlier, I took it as Immersive Portals being the literal only mod installed. This bug report does have the minimum mods for the issue to take place, nothing more, that just being Immersive Portals, Heartstone, and their dependencies.