2x Scrap\addons\merchant\learning.lua:56: attempt to index global 'L' (a nil value)
[string "@scrap\addons\merchant\learning.lua"]:56: in function OnItemSold' [string "@Scrap\addons\merchant\learning.lua"]:26: in function <Scrap\addons\merchant\learning.lua:24> [string "=[C]"]: in function UseContainerItem'
[string "@scrap\addons\merchant\button.lua"]:199: in function `Sell'
[string "@scrap\addons\merchant\button.lua"]:91: in function <Scrap\addons\merchant\button.lua:87>

Locals:
self =

{
SendSignal = defined @scrap\libs\WildAddon-1.0\WildAddon-1.0.lua:82
RegisterMessage = defined @scrap\libs\CallbackHandler-1.0\CallbackHandler-1.0.lua:90
UnregisterMessage = defined @scrap\libs\CallbackHandler-1.0\CallbackHandler-1.0.lua:153
SendMessage = defined @scrap\libs\CallbackHandler-1.0\CallbackHandler-1.0.lua:59
UnregisterSignal = defined @scrap\libs\WildAddon-1.0\WildAddon-1.0.lua:78
RegisterEvent = defined @scrap\libs\CallbackHandler-1.0\CallbackHandler-1.0.lua:90
UnregisterAllMessages = defined @scrap\libs\CallbackHandler-1.0\CallbackHandler-1.0.lua:174
IsActive = defined @scrap\addons\merchant\learning.lua:88
GetBuypackStack = defined @scrap\addons\merchant\learning.lua:92
OnItemSold = defined @scrap\addons\merchant\learning.lua:39
OnEnable = defined @scrap\addons\merchant\learning.lua:23
UnregisterAllEvents = defined @scrap\libs\CallbackHandler-1.0\CallbackHandler-1.0.lua:174
OnItemRefund = defined @scrap\addons\merchant\learning.lua:62
RegisterSignal = defined @scrap\libs\WildAddon-1.0\WildAddon-1.0.lua:74
NewModule = defined @scrap\libs\WildAddon-1.0\WildAddon-1.0.lua:68
UnregisterEvent = defined @scrap\libs\CallbackHandler-1.0\CallbackHandler-1.0.lua:153
Tag = "SCRAP_"
}
id = 80898
stack = 1
link = "|cff0070dd|Hitem:80898::::::::93:253::::::|h[Hopping Mad Leggings]|h|r"
maxStack = 1
stack = 1
old = 1
new = 2
(*temporary) = defined @scrap\addons\main\main.lua:310
(*temporary) = {
SendSignal = defined @scrap\libs\WildAddon-1.0\WildAddon-1.0.lua:82
Merchant = {
}
PrintMoney = defined @scrap\addons\main\main.lua:306
NewModule = defined @scrap\libs\WildAddon-1.0\WildAddon-1.0.lua:68
IterateJunk = defined @scrap\addons\main\main.lua:107
IsBetterEquip = defined @scrap\addons\main\main.lua:216
tip = ScrapTooltip {
}
charsets = {
}
IsStandardQuality = defined @scrap\addons\main\main.lua:188
Tutorials = {
}
IsLowLevel = defined @scrap\addons\main\main.lua:184
ScanLine = defined @scrap\addons\main\main.lua:284
Spotlight = {
}
IsCombatItem = defined @scrap\addons\main\main.lua:192
numLines = 11
Tag = "SCRAP_"
ScanBagSlot = defined @scrap\addons\main\main.lua:289
Learning = {
}
GetEquipValue = defined @scrap\addons\main\main.lua:227
RegisterMessage = defined @scrap\libs\CallbackHandler-1.0\CallbackHandler-1.0.lua:90
DestroyJunk = defined @scrap\addons\main\main.lua:134
ToggleJunk = defined @scrap\addons\main\main.lua:99
Print = defined @scrap\addons\main\main.lua:310
junk = {
}
sets = {
}
baseList = {
}
limit = 3
UnregisterAllEvents = defined @scrap\libs\CallbackHandler-1.0\CallbackHandler-1.0.lua:174
Visualizer = ScrapVisualizer {
}
SendMessage = defined @scrap\libs\CallbackHandler-1.0\CallbackHandler-1.0.lua:59
OnSettings = defined @scrap\addons\main\main.lua:61
LoadTip = defined @scrap\addons\main\main.lua:267
UnregisterSignal = defined @scrap\libs\WildAddon-1.0\WildAddon-1.0.lua:78
IsJunk = defined @scrap\addons\main\mai

This file addons\merchant\learning.lua is missing this line at the top:

local L = LibStub('AceLocale-3.0'):GetLocale('Scrap')