Server Crash
Minecraft 1.12.1
thedragonlib-1.12.1-4.2.0
armorplus-1.12-11.5.1.16-alpha
crash report https://pastebin.com/jZhMNbHs

Thanks for the report!
Hopefully fixed in version 1.12.1-5.0.0

https://minecraft.curseforge.com/projects/thedragonlib/files/2468908 should have fixed the issue, let me know if it did so... thanks!

yap its fixed 👍