Getting these messages upon reloads, relogs and everything. Tried reinstalling AddOnSkins, without it I had no lua errors, when reinstalling they came back.

Message: Interface\AddOns\AddOnSkins\Core\API.lua:873: attempt to index local 'frame' (a nil value)
Time: Tue May 10 12:58:42 2022
Count: 1
Stack: Interface\AddOns\AddOnSkins\Core\API.lua:873: attempt to index local 'frame' (a nil value)
[string "@interface\AddOns\TradeSkillMaster\LibTSM\Service\ErrorHandler.lua"]:761: in function <...Ons\TradeSkillMaster\LibTSM\Service\ErrorHandler.lua:717>
[string "@interface\AddOns\RCLootCouncil\Classes\Services\ErrorHandler.lua"]:149: in function <...dOns\RCLootCouncil\Classes\Services\ErrorHandler.lua:147>
[string "=(tail call)"]: ?
[string "@interface\AddOns\AddOnSkins\Core\API.lua"]:873: in function SkinFrame' [string "@Interface\AddOns\AddOnSkins\Skins\AddOns\RCLootCouncil.lua"]:7: in function <...ace\AddOns\AddOnSkins\Skins\AddOns\RCLootCouncil.lua:4> [string "@Interface\AddOns\AddOnSkins\Core\Core.lua"]:215: in function <Interface\AddOns\AddOnSkins\Core\Core.lua:215> [string "=[C]"]: in function xpcall'
[string "@interface\AddOns\AddOnSkins\Core\Core.lua"]:215: in function CallSkin' [string "@Interface\AddOns\AddOnSkins\Core\Core.lua"]:311: in function ?'
[string "@interface\AddOns\AllTheThings\lib\CallbackHandler-1.0\CallbackHandler-1.0.lua"]:119: in function <...ings\lib\CallbackHandler-1.0\CallbackHandler-1.0.lua:119>
[string "=[C]"]: ?
[string "@interface\AddOns\AllTheThings\lib\CallbackHandler-1.0\CallbackHandler-1.0.lua"]:29: in function <...ings\lib\CallbackHandler-1.0\CallbackHandler-1.0.lua:25>
[string "@interface\AddOns\AllTheThings\lib\CallbackHandler-1.0\CallbackHandler-1.0.lua"]:64: in function `Fire'
[string "@interface\AddOns\ElvUI\Libraries\Core\Ace\AceEvent-3.0\AceEvent-3.0.lua"]:120: in function <...vUI\Libraries\Core\Ace\AceEvent-3.0\AceEvent-3.0.lua:119>

Locals:

Message: ...AddOns\AddOnSkins\Skins\AddOns\tdBattlePetScript.lua:29: attempt to call method 'SetFrameLvel' (a nil value)
Time: Tue May 10 12:58:42 2022
Count: 1
Stack: ...AddOns\AddOnSkins\Skins\AddOns\tdBattlePetScript.lua:29: attempt to call method 'SetFrameLvel' (a nil value)
[string "@interface\AddOns\TradeSkillMaster\LibTSM\Service\ErrorHandler.lua"]:761: in function <...Ons\TradeSkillMaster\LibTSM\Service\ErrorHandler.lua:717>
[string "@interface\AddOns\RCLootCouncil\Classes\Services\ErrorHandler.lua"]:149: in function <...dOns\RCLootCouncil\Classes\Services\ErrorHandler.lua:147>
[string "=(tail call)"]: ?
[string "@interface\AddOns\AddOnSkins\Skins\AddOns\tdBattlePetScript.lua"]:29: in function <...AddOns\AddOnSkins\Skins\AddOns\tdBattlePetScript.lua:5>
[string "@interface\AddOns\AddOnSkins\Core\Core.lua"]:215: in function <Interface\AddOns\AddOnSkins\Core\Core.lua:215>
[string "=[C]"]: in function xpcall' [string "@Interface\AddOns\AddOnSkins\Core\Core.lua"]:215: in function CallSkin'
[string "@interface\AddOns\AddOnSkins\Core\Core.lua"]:311: in function ?' [string "@Interface\AddOns\AllTheThings\lib\CallbackHandler-1.0\CallbackHandler-1.0.lua"]:119: in function <...ings\lib\CallbackHandler-1.0\CallbackHandler-1.0.lua:119> [string "=[C]"]: ? [string "@Interface\AddOns\AllTheThings\lib\CallbackHandler-1.0\CallbackHandler-1.0.lua"]:29: in function <...ings\lib\CallbackHandler-1.0\CallbackHandler-1.0.lua:25> [string "@Interface\AddOns\AllTheThings\lib\CallbackHandler-1.0\CallbackHandler-1.0.lua"]:64: in function Fire'
[string "@interface\AddOns\ElvUI\Libraries\Core\Ace\AceEvent-3.0\AceEvent-3.0.lua"]:120: in function <...vUI\Libraries\Core\Ace\AceEvent-3.0\AceEvent-3.0.lua:119>

Locals:

Was fixed by removing the skin debugging check mark, I had no idea it was on. all I did was install addon.