[애드온] 애드온 에러 질문좀요

18x ...izzard_EditMode/Mainline/EditModeSystemTemplates.lua:535: attempt to perform arithmetic on local 'left' (a nil value)

[string "@Blizzard_EditMode/Mainline/EditModeSystemTemplates.lua"]:535: in function `GetScaledSelectionSides'

[string "@Blizzard_EditMode/Mainline/EditModeSystemTemplates.lua"]:507: in function `IsVerticallyAlignedWithFrame'

[string "@Blizzard_EditMode/Mainline/EditModeSystemTemplates.lua"]:725: in function `GetFrameMagneticEligibility'

[string "@Blizzard_EditMode/Mainline/EditModeUtil.lua"]:152: in function `GetEligibleMagneticFrames'

[string "@Blizzard_EditMode/Mainline/EditModeUtil.lua"]:341: in function `GetMagneticFrameInfoOptions'

[string "@Blizzard_EditMode/Mainline/EditModeUtil.lua"]:424: in function `GetMagneticFrameInfos'

[string "@Blizzard_EditMode/Mainline/EditModeManager.lua"]:961: in function `RefreshSnapPreviewLines'

[string "@Blizzard_EditMode/Mainline/EditModeManager.lua"]:72: in function <...ddOns/Blizzard_EditMode/Mainline/EditModeManager.lua:70>

bugsack 애드온으로 탐색하니 저런 메시지의 에러가 나오는데 뭔지 아시는분 계실가요