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-all.jar

Latest Log

https://gist.github.com/Nox13last/d225ed934b1fccffe11ad0ef360207ec

Crash Report (if applicable)

https://gist.github.com/Nox13last/b93df7bf37c32e1dd635402e63d3f5a1

Steps to Reproduce

1. Add Immersive Portals mod
2. Load
3. Halt & Catch Fire

What You Expected

The above, minus step 3.

What Happened Instead

The game crashes before the main menu.

Additional Details

I normally use NeoForge, which presents a different (more severe-looking) error. As the two errors are cognate, but present with differing log data, I have created a second ticket, which can be found at #205.
Error still presents with mod version 3.0.4 (the previous version). The changelog for the two most recent files references some sort of build failure? Is that what is happening here?

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.

Never mind. This issue was caused by a missing Cloth Config. I had disabled it during the troubleshooting in #205. Maybe bring up a dependency error instead of a NoDefClassFound? I dunno how this works.

The two tickets are not related after all. But the other ticket presents an extant problem.