the error occurs on the 5.03 european client when opening a bag.

224x Combuctor-5.4.0\components\item.lua:298: attempt to index field "newItemBorder" (a nil value)
Combuctor-5.4.0\components\item.lua:298: in function "HideBorder"
Combuctor-5.4.0\components\item.lua:258: in function <Combuctor\components\item.lua:255>
Combuctor_Scrap\Glow.lua:66: in function "UpdateBorder"
Combuctor-5.4.0\components\item.lua:187: in function "Update"
Combuctor-5.4.0\components\item.lua:121: in function <Combuctor\components\item.lua:120>

Combuctor-5.4.0\components\item.lua:29: in function "Set"
Combuctor-5.4.0\components\itemFrame.lua:121: in function <Combuctor\components\itemFrame.lua:112>
(tail call): ?
Combuctor-5.4.0\components\itemFrame.lua:197: in function "Regenerate"
Combuctor-5.4.0\components\itemFrame.lua:42: in function <Combuctor\components\itemFrame.lua:40>

main.lua:202: in function "OpenAllBags"
FrameXML\MerchantFrame.lua:47: in function <FrameXML\MerchantFrame.lua:46>

FrameXML\UIParent.lua:1800: in function

That version is for path 5.4.