[일반] 교수님 이 오류는 왜일어나는걸까요?

1139x bad argument #1 to '?' (Usage: local activityInfo = C_LFGList.GetActivityInfoTable(activityID [, questID, showWarmode]))

[string "=[C]"]: in function `GetActivityInfoTable'

[string "return function() local DungeonCategory = 2"]:146: in function <[string "return function() local DungeonCategory = 2"]:137>

[string "return function() local DungeonCategory = 2"]:241: in function <[string "return function() local DungeonCategory = 2"]:231>

[string "=(tail call)"]: ?

[string "return function() local DungeonCategory = 2"]:359: in function <[string "return function() local DungeonCategory = 2"]:356>

[string "=[C]"]: in function `LFGListApplicationViewer_UpdateApplicantMember'

[string "@Blizzard_GroupFinder/Mainline/LFGList.lua"]:1801: in function <...aceBlizzard_GroupFinder/Mainline/LFGList.lua:1789>

[string "=[C]"]: in function `LFGListApplicationViewer_UpdateApplicant'

[string "@Blizzard_GroupFinder/Mainline/LFGList.lua"]:1760: in function `LFGListApplicationViewer_InitButton'

[string "@Blizzard_GroupFinder/Mainline/LFGList.lua"]:1501: in function `initializer'

[string "@Blizzard_SharedXML/Shared/Scroll/ScrollBoxListView.lua"]:374: in function `InvokeInitializer'

[string "@Blizzard_SharedXML/Shared/Scroll/ScrollBoxListView.lua"]:392: in function <...izzard_SharedXML/Shared/Scroll/ScrollBoxListView.lua:391>

...

[string "@Blizzard_SharedXMLBase/CallbackRegistry.lua"]:147: in function `TriggerEvent'

[string "@Blizzard_SharedXML/Shared/Scroll/ScrollBoxListView.lua"]:319: in function `SignalDataChangeEvent'

[string "@Blizzard_SharedXML/Shared/Scroll/ScrollBoxListView.lua"]:299: in function `SetDataProvider'

[string "@Blizzard_SharedXML/Shared/Scroll/ScrollBox.lua"]:639: in function `SetDataProvider'

[string "@Blizzard_GroupFinder/Mainline/LFGList.lua"]:1784: in function `LFGListApplicationViewer_UpdateResults'

[string "return function() local DungeonCategory = 2"]:651: in function <[string "return function() local DungeonCategory = 2"]:581>

[string "=[C]"]: in function `LFGListUtil_SortApplicants'

[string "@Blizzard_GroupFinder/Mainline/LFGList.lua"]:1712: in function `LFGListApplicationViewer_UpdateResultList'

[string "@Blizzard_GroupFinder/Mainline/LFGList.lua"]:1524: in function `onEvent'

[string "@Blizzard_GroupFinder/Mainline/LFGList.lua"]:262: in function <...aceBlizzard_GroupFinder/Mainline/LFGList.lua:171>

Locals:

(*temporary) = "bad argument #1 to '?' (Usage: local activityInfo = C_LFGList.GetActivityInfoTable(activityID [, questID, showWarmode]))"