Describe the bug
hello, im on 1.20.4 and i recently got this plugin on a aternos server, every backpack works fine except for the furnace one

To Reproduce
Steps to reproduce the behavior:
craft furnace backpack
craft backpack key
attempt to open furnace backpack with the key

Expected behavior
nothing seems to happen when i try it

Screenshots
If applicable, add screenshots to help explain your problem.

Version info
minecraft 1.20.4, paperMC 1.20.4

Additional context
if anyone has a fix for this id gladly appreciate it