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

Yes

Forge Version

NeoForge 21.1.213

ImmersivePortals Version

NeoForge-1.6.7+1.21.1

Latest Log

https://gist.github.com/V3RYM3GAFUN/8d44b80e6f920ac3ee5b7c43e4ac1af8

Crash Report (if applicable)

https://gist.github.com/V3RYM3GAFUN/9f79233364a24b64955cca4fe7c79b46

Steps to Reproduce

1. Have both mods: SecurityCraft v1.10.1 & iPortal 6.0.7
2. Create new world

What You Expected

New world is created.

What Happened Instead

Game closes down and a crash report on the server is created.

Additional Details

No response

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.