When opening a character with upgraded gear...

[xonelith]

1x libs\6LibItemUpgradeInfo-1.0-4\Core.lua:153: Usage: GetItemInfo(itemID|"name"|"itemlink")

libs\6LibItemUpgradeInfo-1.0-4\Core.lua:153: in function <libs\LibItemUpgradeInfo-1.0\Core.lua:152>
(tail call): ?
ItemLevelOverlay\ItemLevelOverlay-0.1.0.lua:47: in function <ItemLevelOverlay\ItemLevelOverlay.lua:45>
ItemLevelOverlay\ItemLevelOverlay-0.1.0.lua:76: in function "initialize"
ItemLevelOverlay\ItemLevelOverlay-0.1.0.lua:79: in main chunk

Locals:
self =

{
GetCurrentUpgrade = defined @interface\AddOns\ItemLevelOverlay\libs\LibItemUpgradeInfo-1.0\Core.lua:81
GetMaximumUpgrade = defined @interface\AddOns\ItemLevelOverlay\libs\LibItemUpgradeInfo-1.0\Core.lua:95
GetItemLevelUpgrade = defined @interface\AddOns\ItemLevelOverlay\libs\LibItemUpgradeInfo-1.0\Core.lua:110
GetItemUpgradeInfo = defined @interface\AddOns\ItemLevelOverlay\libs\LibItemUpgradeInfo-1.0\Core.lua:132
_CheckUpgradeTable = defined @interface\AddOns\ItemLevelOverlay\libs\LibItemUpgradeInfo-1.0\Core.lua:228
GetUpgradedItemLevel = defined @interface\AddOns\ItemLevelOverlay\libs\LibItemUpgradeInfo-1.0\Core.lua:152
GetUpgradeID = defined @interface\AddOns\ItemLevelOverlay\libs\LibItemUpgradeInfo-1.0\Core.lua:67
}
itemString = nil
(_temporary) = defined =[C]:-1
(_temporary) = 4