attempt to call method 'GetVariableType' (a nil value) #1

8x 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"]:209: in function <...lizzard_Settings_Shared/Blizzard_SettingsInbound.lua:167>
[string "=[C]"]: in function SetAttribute' [string "@Blizzard_Settings_Shared/Blizzard_SettingsInbound.lua"]:100: in function <...lizzard_Settings_Shared/Blizzard_SettingsInbound.lua:99> [string "=(tail call)"]: ? [string "scripts/bastion/src/Interface.lua"]:215: in function Slider'
[string "scripts/bastion/scripts/ShamanSettings.lua"]:10: in main chunk
[string "=[C]"]: in function pcall' [string "lua/tinkr.luac"]:188: in function <[string "lua/tinkr.luac"]:134> [string "=(tail call)"]: ? [string "=(tail call)"]: ? [string "scripts/bastion/src/_bastion.lua"]:43: in function <[string "scripts/bastion/src/_bastion.lua"]:25> [string "scripts/bastion/src/_bastion.lua"]:413: in function Bootstrap'
[string "scripts/bastion/src/_bastion.lua"]:416: in main chunk
[string "=(tail call)"]: ?
[string "lua/Util/Modules/File.luac"]:215: in function Run' [string "lua/Util/Modules/Script.luac"]:237: in function Autoload'
[string "lua/tinkr.luac"]:310: in function `func'
[string "tinkr"]:33: in main chunk

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

I have the same symptom in wow classic cataclysm.

I really want to use it, but is there any way?