UI issues1

1x FrameXML/EditModeSystemTemplates.lua:426: attempt to perform arithmetic on local 'left' (a nil value)
[string "@FrameXML/EditModeSystemTemplates.lua"]:426: in function `GetScaledSelectionSides'
[string "@FrameXML/EditModeSystemTemplates.lua"]:398: in function `IsVerticallyAlignedWithFrame'
[string "@FrameXML/EditModeSystemTemplates.lua"]:588: in function `GetFrameMagneticEligibility'
[string "@FrameXML/EditModeUtil.lua"]:123: in function `GetEligibleMagneticFrames'
[string "@FrameXML/EditModeUtil.lua"]:217: in function `FindMagneticFrames'
[string "@FrameXML/EditModeUtil.lua"]:279: in function `ApplyMagnetism'
[string "@FrameXML/EditModeSystemTemplates.lua"]:666: in function `OnDragStop'
[string "@FrameXML/EditModeSystemTemplates.lua"]:2032: in function <FrameXML/EditModeSystemTemplates.lua:2031>

Locals:
self = MultiBarBottomLeft {
 0 = <userdata>
 buttonPadding = 2
 GetShowAllButtons = <function> defined @FrameXML/ActionBar.lua:202
 UpdateSystemSettingAlwaysShowButtons = <function> defined @FrameXML/EditModeSystemTemplates.lua:860
 UpdateMagnetismRegistration = <function> defined @FrameXML/EditModeSystemTemplates.lua:594
 GetSnapOffsets = <function> defined @FrameXML/EditModeSystemTemplates.lua:479
 UpdateFrameStrata = <function> defined @FrameXML/ActionBar.lua:206
 UpdateButtonArt = <function> defined @FrameXML/EditModeSystemTemplates.lua:757
 IsFrameAnchoredToMe = <function> defined @FrameXML/EditModeSystemTemplates.lua:557
 downKeys = <table> {
 }
 resetToDefaultPositionButton = Button {
 }
 buttonTemplate = "MultiBar1ButtonTemplate"
 ShowBase = <function> defined =[C]:-1
 IsShown = <function> defined @FrameXML/ActionBar.lua:307
 GetSelectionOffset = <function> defined @FrameXML/EditModeSystemTemplates.lua:431
 ResetToDefaultPosition = <function> defined @FrameXML/EditModeSystemTemplates.lua:216
 RefreshButtonArt = <function> defined @FrameXML/EditModeSystemTemplates.lua:750
 GetScaledSelectionSides = <function> defined @FrameXML/EditModeSystemTemplates.lua:423
 SelectSystem = <function> defined @FrameXML/EditModeSystemTemplates.lua:622
 buttonArtDirty = false
 GetFrameMagneticEligibility = <function> defined @FrameXML/EditModeSystemTemplates.lua:577
 AddLayoutChildren = <function> defined @SharedXML/LayoutFrame.lua:48
 IsBelowFrame = <function> defined @FrameXML/EditModeSystemTemplates.lua:390
 UpdateSystemSettingIconSize = <function> defined @FrameXML/EditModeSystemTemplates.lua:802
 SetScaleBase = <function> defined =[C]:-1
 HasActiveChanges = <function> defined @FrameXML/EditModeSystemTemplates.lua:312
 GetScaledCenter = <function> defined @FrameXML/EditModeSystemTemplates.lua:416
 IsToTheRightOfFrame = <function> defined @FrameXML/EditModeSystemTemplates.lua:378
 UpdateDisplayInfoOptions = <function> defined @FrameXML/EditModeSystemTemplates.lua:347
 settingDisplayInfoMap = <table> {
 }
 ProcessMovementKey = <function> defined @FrameXML/EditModeSystemTemplates.lua:36
 GetSettingValueBool = <function> defined @FrameXML/EditModeSystemTemplates.lua:327
 OnKeyUp = <function> defined @FrameXML/EditModeSystemTemplates.lua:73
 IsLayoutFrame = <function> defined @SharedXML/LayoutFrame.lua:36
 DoesSettingValueEqual = <function> defined @FrameXML/EditModeSystemTemplates.lua:331
 MarkDirty = <function> defined @SharedXML/LayoutFrame.lua:92
 ShouldResetSettingsDialogAnchors = <function> defined @FrameXML/EditModeSystemTemplates.lua:155
 dirtySettings = <table> {
 }
 UpdateGridLayout = <function> defined @FrameXML/EditModeSystemTemplates.lua:736
 IsToTheLeftOfFrame = <function> defined @FrameXML/EditModeSystemTemplates.lua:372
 GetSettingsDialogAnchor = <function> defined @FrameXML/EditModeSystemTemplates.lua:356
 hasActiveChanges = false
 OnSystemLoad = <function> defined @FrameXML/EditModeSystemTemplates.lua:3
 ClearFrameSnap = <function> defined @FrameXML/EditModeSystemTemplates.lua:516
 GetCombinedCenterOffset = <function> defined @FrameXML/EditModeSystemTemplates.lua:466
 SetupSettingsDialogAnchor = <function> defined @FrameXML/EditModeSystemTemplates.lua:300
 IsShownOverride = <function> defined @FrameXML/ActionBar.lua:307
 dirty = false
 SetPointBase = <function> defined =[C]:-1
 UpdateSystem = <function> defined @FrameXML/EditModeSystemTemplates.lua:674
 UpdateShownButtons = <function> defined @FrameXML/ActionBar.lua:210
 UpdateDirtySettings = <function> defined @FrameXML/EditModeSystemTemplates.lua:176
 isHighlighted = true
 BreakSnappedFrames = <function> defined @FrameXML/EditModeSystemTemplates.lua:499
 HideOverride = <