1x Blizzard_Settings_Shared/Blizzard_Setting.lua:383: 'variableTbl' argument must be a table.
[string "=[C]"]: in function assert' [string "@Blizzard_Settings_Shared/Blizzard_Setting.lua"]:383: in function Init'
[string "@Blizzard_SharedXMLBase/Mixin.lua"]:28: in function <Blizzard_SharedXMLBase/Mixin.lua:26>
[string "@Blizzard_Settings_Shared/Blizzard_SettingsInbound.lua"]:197: in function <...lizzard_Settings_Shared/Blizzard_SettingsInbound.lua:155>
[string "=[C]"]: in function SetAttribute' [string "@Blizzard_Settings_Shared/Blizzard_SettingsInbound.lua"]:98: in function <...lizzard_Settings_Shared/Blizzard_SettingsInbound.lua:97> [string "=(tail call)"]: ? [string "@QuestTTS/src/expansions/retail.lua"]:56: in function proxySetting'
[string "@QuestTTS/src/expansions/retail.lua"]:81: in function initSettings' [string "@QuestTTS/src/main.lua"]:39: in function fn'
[string "@QuestTTS/libs/addon.lua"]:382: in function callbackFn' [string "@QuestTTS/libs/array.lua"]:164: in function forEach'
[string "@QuestTTS/libs/addon.lua"]:380: in function <QuestTTS/libs/addon.lua:378>
[string "@QuestTTS/libs/addon.lua"]:166: in function handler' [string "@QuestTTS/libs/addon.lua"]:371: in function callbackFn'
[string "@QuestTTS/libs/array.lua"]:164: in function `forEach'
[string "@QuestTTS/libs/addon.lua"]:369: in function <QuestTTS/libs/addon.lua:365>

Locals:
(*temporary) = false
(*temporary) = "'variableTbl' argument must be a table."

1x ...ddOns/Blizzard_Settings_Shared/Blizzard_Settings.lua:351: attempt to call method 'GetVariableType' (a nil value)
[string "@Blizzard_Settings_Shared/Blizzard_Settings.lua"]:351: in function CreateCheckboxInitializer' [string "@Blizzard_Settings_Shared/Blizzard_Settings.lua"]:375: in function <...ddOns/Blizzard_Settings_Shared/Blizzard_Settings.lua:374> [string "=(tail call)"]: ? [string "@QuestTTS/src/expansions/retail.lua"]:84: in function initSettings'
[string "@QuestTTS/src/main.lua"]:39: in function fn' [string "@QuestTTS/libs/addon.lua"]:382: in function callbackFn'
[string "@QuestTTS/libs/array.lua"]:164: in function forEach' [string "@QuestTTS/libs/addon.lua"]:380: in function <QuestTTS/libs/addon.lua:378> [string "@QuestTTS/libs/addon.lua"]:166: in function handler'
[string "@QuestTTS/libs/addon.lua"]:371: in function callbackFn' [string "@QuestTTS/libs/array.lua"]:164: in function forEach'
[string "@QuestTTS/libs/addon.lua"]:369: in function <QuestTTS/libs/addon.lua:365>

Locals:
setting =

{
order = 41
ID = 41
name = "QuestTTS"
subcategories = {
}
}
options = nil
tooltip = ""
(*temporary) = nil
(*temporary) = {
order = 41
ID = 41
name = "QuestTTS"
subcategories = {
}
}
(*temporary) = "attempt to call method 'GetVariableType' (a nil value)"

Just made PR, that should work until z0fa creates proper fix.