Can't mark items as junk

[Jokinen86]

26x Prat-3.0-3.9.39/addon/addon.lua:726: Usage: local isCensored = C_ChatInfo.IsChatLineCensored(chatLine)
[string "=[C]"]: in function IsChatLineCensored' [string "@Prat-3.0-3.9.39/addon/addon.lua"]:726: in function <Prat-3.0/addon/addon.lua:615> [string "=(tail call)"]: ? [string "@Scrap/addons/main/main.lua"]:239: in function Print'
[string "@Scrap/addons/main/main.lua"]:229: in function PrintMoney' [string "@Scrap/addons/merchant/button.lua"]:242: in function Repair'
[string "@Scrap/addons/merchant/button.lua"]:55: in function ?' [string "@Scrap/libs/CallbackHandler-1.0-8/CallbackHandler-1.0.lua"]:119: in function <...rap/libs/CallbackHandler-1.0/CallbackHandler-1.0.lua:119> [string "=[C]"]: ? [string "@Scrap/libs/CallbackHandler-1.0-8/CallbackHandler-1.0.lua"]:29: in function <...rap/libs/CallbackHandler-1.0/CallbackHandler-1.0.lua:25> [string "@Scrap/libs/CallbackHandler-1.0-8/CallbackHandler-1.0.lua"]:64: in function SendMessage'
[string "@Scrap/libs/WildAddon-1.0-1/WildAddon-1.0.lua"]:83: in function SendSignal' [string "@Scrap/addons/main/main.lua"]:35: in function <Scrap/addons/main/main.lua:35> [string "=[C]"]: ? [string "@Scrap/libs/CallbackHandler-1.0-8/CallbackHandler-1.0.lua"]:29: in function <...rap/libs/CallbackHandler-1.0/CallbackHandler-1.0.lua:25> [string "@Scrap/libs/CallbackHandler-1.0-8/CallbackHandler-1.0.lua"]:64: in function Fire'
[string "@Scrap/libs/AceEvent-3.0-4/AceEvent-3.0.lua"]:120: in function <...faceScrap/libs/AceEvent-3.0/AceEvent-3.0.lua:119>

Locals:
(*temporary) = nil

I get this when trying to mark things as junk and the item subsequently doesn't get marked as junk. I'm using the latest retail version (10.1.6).