Have an error initializing the leveling guide for Classic WoW.

[Tenkman]

Error during initialization sequence 'ItemScore':
...ce\AddOns\ZygorGuidesViewerClassic\Item-Upgrades.lua:451: attempt to compare nil with number
-- STACKTRACE: --
[ZGV]\Item-Upgrades.lua:451: in function <[ZGV]\Item-Upgrades.lua:451>
[C]: in function `sort'
[ZGV]\Item-Upgrades.lua:451: in function `ProcessWeaponQueue'
[ZGV]\Item-Upgrades.lua:600: in function `ScanBagsForUpgrades'
[ZGV]\Item-ItemScore.lua:114: in function `RefreshUserData'
[ZGV]\Item-ItemScore.lua:68: in function `Initialise'
[ZGV]\Item-ItemScore.lua:735: in function `func'
[ZGV]\ZygorGuidesViewer.lua:683: in function <[ZGV]\ZygorGuidesViewer.lua:683>

Time: Tue Apr 7 02:19:32 2020
Count: 1
Stack: Error during initialization sequence 'ItemScore':
...ce\AddOns\ZygorGuidesViewerClassic\Item-Upgrades.lua:451: attempt to compare nil with number
-- STACKTRACE: --
[ZGV]\Item-Upgrades.lua:451: in function <[ZGV]\Item-Upgrades.lua:451>
[C]: in function `sort'
[ZGV]\Item-Upgrades.lua:451: in function `ProcessWeaponQueue'
[ZGV]\Item-Upgrades.lua:600: in function `ScanBagsForUpgrades'
[ZGV]\Item-ItemScore.lua:114: in function `RefreshUserData'
[ZGV]\Item-ItemScore.lua:68: in function `Initialise'
[ZGV]\Item-ItemScore.lua:735: in function `func'
[ZGV]\ZygorGuidesViewer.lua:683: in function <[ZGV]\ZygorGuidesViewer.lua:683>

...ddOns\ZygorGuidesViewerClassic\ZygorGuidesViewe r.lua:636: in function `StartupModule_Threaded'
...ddOns\ZygorGuidesViewerClassic\ZygorGuidesViewe r.lua:685: in function <...ddOns\ZygorGuidesViewerClassic\ZygorGuidesView er.lua:650>

Locals: <none>

[Tenkman]

I have also disabled all of my other addons, and this error message is still popping up.

[ZG Support 1]

This should be fixed with the next update. Temporary work around is to remove all weapons from your bags.