The game version I am using is Forge 1.12.2-14.23.5.2854

When creating a dimension or going between custom dimensions with either mystcraft or RFToolsDimensions, the game freezes, then crashes. This mod is causing the error. I will post a crash log file in the attachments.

Crash report:
crash-2021-01-15_20.06.30-server.txt

Log File:
latest.log

I'm pretty sure this mod is fabric only.
Edit: Ignore this, I misread the readme.