GTNH Game Crash on startup, Cause stated as Gregtech

[Zeeman26]

Your GTNH Discord Username

Zee626

Your Pack Version

2.5.1

Your Server

SP

Java Version

Java 8

Type of Server

None

Your Actions

Attempt to open world. World Closed normally on previous playthrough without crashing. Loaded Backups from up to 2 hours before and still got the same crash. Previous save states from about a week before load fine, so it is something between then and now. World will load for about a second, then crash back to main menu.

Crash Report

Too long to post in comment box, file below

GTNH Crash.docx

Final Checklist

• [X] I have searched this issue tracker and there is nothing similar already. Posting on a closed issue saying the crash still exists will prompt us to investigate and reopen it once we confirm your report.
• [X] I can reproduce this crash consistently by following the exact steps I described above.
• [ ] I have asked other people and they confirm they also crash by following the exact steps I described above.

[Zeeman26]

Backed up to an older version and it loaded fine, then when I tried to open it the next day it crashed again. Updated crash report here GTNH Crash 2.txt