For feature requests, just erase this template and clearly describe the feature you'd like to see

Minecraft Version

1.12.2

Forge Version

14.23.5.2838

Mod Version

pneumaticcraft-repressurized-1.12.2-0.11.5-371.jar

Describe your problem, including steps to reproduce it

Equip the pneumatic helmet and turn on the block tracking thing and it just crashes now whenever i try join the server it crashes for everyone
crash.txt

Any other comments?

I don't see anything related to PNC here. Looks like a Galacticraft problem, plain and simple. I'd suggest raising an issue with them.