Crash when try create a world in stack mode with overworld and nether

[Anewri32]

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

Yes

Forge Version

43.2.0

ImmersivePortals Version

2.3.3

Latest Log

https://mclo.gs/LviJeLS

Crash Report (if applicable)

https://bytebin.lucko.me/C2jm4cC3vd

Steps to Reproduce

1. Create a new world with the stack option with overworld and nether

What You Expected

Correct execution

What Happened Instead

Crash

Additional Details

No response

Please Read and Confirm The Following

• [X] I have confirmed this bug can be replicated without the use of Optifine.
• [X] 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).
• [X] I have confirmed this does not happen on the fabric version (If it does please report to here instead).
• [X] I have confirmed I'm not using a hybrid server (Magma, Cauldron) or a different (non official) Forge Server release.
• [X] I have confirmed this issue is unique and has not been reported already.

[Anewri32]

relationed to other dimensional mod