Editmode error

gistfile1.txt

427x ...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>

Locals:
self = BossTargetFrameContainer {
 systemInfo = <table> {
 }
 downKeys = <table> {
 }
 breakSnappedFramesOnSave = true
 smallSize = true
 spacing = 10
 alwaysUseTopRightAnchor = true
 isManagedFrame = true
 hasActiveChanges = false
 dirty = false
 isHighlighted = true
 systemIndex = 6
 isInEditMode = true
 snappedFrames = <table> {
 }
 ignoreFramePositionManager = true
 isRightManagedFrame = true
 layoutParent = UIParentRightManagedFrameContainer {
 }
 savedSystemInfo = <table> {
 }
 systemNameString = "Boss Frames"
 BossTargetFrames = <table> {
 }
 isSelected = false
 castBarOnSide = true
 dirtySettings = <table> {
 }
 hideWhenActionBarIsOverriden = false
 settingMap = <table> {
 }
 settingDisplayInfoMap = <table> {
 }
 Selection = Frame {
 }
 settingsDialogAnchor = <table> {
 }
 align = "right"
 respectChildScale = true
 layoutIndex = 4
 defaultHideSelection = true
 system = 3
 rightPadding = -70
}
left = nil
bottom = nil
width = nil
height = nil
scale = 1
(*temporary) = BossTargetFrameContainer {
 systemInfo = <table> {
 }
 downKeys = <table> {
 }
 breakSnappedFramesOnSave = true
 smallSize = true
 spacing = 10
 alwaysUseTopRightAnchor = true
 isManagedFrame = true
 hasActiveChanges = false
 dirty = false
 isHighlighted = true
 systemIndex = 6
 isInEditMode = true
 snappedFrames = <table> {
 }
 ignoreFramePositionManager = true
 isRightManagedFrame = true
 layoutParent = UIParentRightManagedFrameContainer {
 }
 savedSystemInfo = <table> {
 }
 systemNameString = "Boss Frames"
 BossTargetFrames = <table> {
 }
 isSelected = false
 castBarOnSide = true
 dirtySettings = <table> {
 }
 hideWhenActionBarIsOverriden = false
 settingMap = <table> {
 }
 settingDisplayInfoMap = <table> {
 }
 Selection = Frame {
 }
 settingsDialogAnchor = <table> {
 }
 align = "right"
 respectChildScale = true
 layoutIndex = 4
 defaultHideSelection = true
 system = 3
 rightPadding = -70
}
(*temporary) = 1
(*temporary) = nil
(*temporary) = nil
(*temporary) = "attempt to perform arithmetic on local 'left' (a nil value)"