Describe the bug
When ever I press "b" to open backpack the game crashes.

To Reproduce
Steps to reproduce the behavior:

1. Open backpack
2. Crash

Expected behavior
Not crash

Versions
Forge : 40.1.68
Sophisticated backpack : 1.18.2-3.18.4.646
Core : 1.18.2-0.4.10.85

(I updated the core mod today too, I don't know if I played right after and crashed but it does crash now. Also downgrading to Core : 1.18.2-0.4.5.76 fixes the problem)

Log :
https://gist.github.com/INooBTooMuch/ee146740f757d5b5dfa70afe43bd110b#file-gistfile1-txt

Can confirm, direct crash log:
https://pastebin.com/m1z4FYVj

missed upload of the new SB version, just uploaded that to CF should be approved shortly

released on CF