Hi, i have a bug, when i set custom skins (/npc skin -t )

Error: https://pastebin.com/WMuWtGMk
And when rename NPC
Error: https://pastebin.com/v8Y34DFt

The error message very clearly says what you need to do. And that it's not a bug.

Report it to the Citizens author btw. It's something they need to fix.