error

[gaohan250]

21x FrameXML/EditModeSystemTemplates.lua:631: attempt to perform arithmetic on local 'offsetY' (a nil value)
[string "@FrameXML/EditModeSystemTemplates.lua"]:631: in function GetBottomAnchoredHeight' [string "@FrameXML/EditModeUtil.lua"]:39: in function GetBottomActionBarHeight'
[string "@FrameXML/UIParent.lua"]:3083: in function UIParentManageFramePositions' [string "@FrameXML/UIParent.lua"]:2570: in function <FrameXML/UIParent.lua:2557> [string "=[C]"]: in function SetAttribute'
[string "@FrameXML/UIParent.lua"]:3113: in function UIParent_ManageFramePositions' [string "@FrameXML/EditModeManager.lua"]:640: in function UpdateBottomActionBarPositions'
[string "@FrameXML/EditModeManager.lua"]:554: in function UpdateActionBarLayout' [string "@FrameXML/EditModeSystemTemplates.lua"]:655: in function UpdateGridLayout'
[string "@FrameXML/StanceBar.lua"]:73: in function UpdateState' [string "@FrameXML/StanceBar.lua"]:25: in function Update'
[string "@FrameXML/ActionBarController.lua"]:81: in function <FrameXML/ActionBarController.lua:55>

Locals:
self = MainMenuBar {
0 =
QuickKeybindRightShadow = Texture {
}
UpdateSystemSettingAlwaysShowButtons = defined @FrameXML/EditModeSystemTemplates.lua:772
UpdateMagnetismRegistration = defined @FrameXML/EditModeSystemTemplates.lua:506
GetSnapOffsets = defined @FrameXML/EditModeSystemTemplates.lua:411
UpdateFrameStrata = defined @FrameXML/ActionBar.lua:194
UpdateButtonArt = defined @FrameXML/EditModeSystemTemplates.lua:669
IsFrameAnchoredToMe = defined @FrameXML/EditModeSystemTemplates.lua:469
buttonTemplate = "MainBarActionBarButtonTemplate"
ShowBase = defined =[C]:-1
IsShown = defined @FrameXML/ActionBar.lua:286
GetSelectionOffset = defined @FrameXML/EditModeSystemTemplates.lua:363
ResetToDefaultPosition = defined @FrameXML/EditModeSystemTemplates.lua:148
RefreshButtonArt = defined @FrameXML/EditModeSystemTemplates.lua:662
GetScaledSelectionSides = defined @FrameXML/EditModeSystemTemplates.lua:355
SelectSystem = defined @FrameXML/EditModeSystemTemplates.lua:534
buttonArtDirty = false