After accepting a quest I get a continuous Lua Error

[jasuk70]

Message: Interface\AddOns\ZygorGuidesViewer\Item-Events.lua:107: Usage: GetItemInfo(itemID|"name"|"itemlink")
Time: 03/05/15 22:48:06
Count: 39
Stack: [C]: in function `GetItemInfo'
Interface\AddOns\ZygorGuidesViewer\Item-Events.lua:107: in function `OnUpdate'
Interface\AddOns\ZygorGuidesViewer\Item-Events.lua:146: in function <Interface\AddOns\ZygorGuidesViewer\Item-Events.lua:146>

Locals: (*temporary) = nil

The quest is: Felsworn Gas Mask
Location: Blade's Edge Mountains (Outland)
The item that gets added to the inventory is: Felswarn Gas Mask (Stench is gone)

[ZG Support 1]

When you are in game and you open the guide selection window (small drop down arrow on guide viewer) what does it show in the lower left corner for the version number?

[jasuk70]

Its version 5.0.11544

[ZG Support 1]

If you disable the Gear System in the guide viewer settings does the error stop?

[jasuk70]

I just ran with the box on screen and a few minutes later down into the quest it stopped updating the error so I could close the error box.

[Cartman]

I don't know if that's the problem but a quick look into the guide file revealed a typo.
The guide step says |equipped Felswron Gas Mask##31366 |use Felsworn Gas Mask##31366
Should be |equipped Felsworn Gas Mask##31366 |use Felsworn Gas Mask##31366

Affected guide files are ZygorLevelingAllianceCATA.lua and ZygorTitlesHordeCATA.lua, in both cases two steps are affected.
Other guide files seem to only have the |use command and are fine.