If I use diabolic UI with both main action bars (1&2) and no other addons loaded I get the following
when I cast mindflay (for example) or i stop before channel end it or it ends itself. It also errors if I drag the button
off those base whilst the buff/debuff is still applied. I've also seen power-word shield do
this. If i open my spellbook with the same spell showing it triggers it as well.

Any Ideas? I'm assuming it's an incompatibility with Blizz's UI Edit-grid thing.

Message: Interface/FrameXML/EditModeSystemTemplates.lua:631: attempt to perform arithmetic on local 'offsetY' (a nil value)
Time: Mon Nov 7 18:33:49 2022
Count: 2
Stack: Interface/FrameXML/EditModeSystemTemplates.lua:631: attempt to perform arithmetic on local 'offsetY' (a nil value)
[string "@Interface/FrameXML/EditModeSystemTemplates.lua"]:631: in function GetBottomAnchoredHeight' [string "@Interface/FrameXML/EditModeUtil.lua"]:39: in function GetBottomActionBarHeight'
[string "@Interface/FrameXML/UIParent.lua"]:3074: in function UIParentManageFramePositions' [string "@Interface/FrameXML/UIParent.lua"]:2561: in function <Interface/FrameXML/UIParent.lua:2548> [string "=[C]"]: in function SetAttribute'
[string "@Interface/FrameXML/UIParent.lua"]:3104: in function UIParent_ManageFramePositions' [string "@Interface/FrameXML/EditModeManager.lua"]:641: in function UpdateBottomActionBarPositions'
[string "@Interface/FrameXML/EditModeManager.lua"]:555: in function UpdateActionBarLayout' [string "@Interface/FrameXML/EditModeSystemTemplates.lua"]:655: in function UpdateGridLayout'
[string "@Interface/FrameXML/ActionButton.lua"]:373: in function UpdateAction' [string "@Interface/FrameXML/ActionButton.lua"]:803: in function OnEvent'
[string "@Interface/FrameXML/ActionButton.lua"]:216: in function <Interface/FrameXML/ActionButton.lua:213>

Locals: self = MainMenuBar {
0 =
QuickKeybindRightShadow = Texture {
}
UpdateSystemSettingAlwaysShowButtons = defined @Interface/FrameXML/EditModeSystemTemplates.lua:772
UpdateMagnetismRegistration = defined @Interface/FrameXML/EditModeSystemTemplates.lua:506
GetSnapOffsets = defined @Interface/FrameXML/EditModeSystemTemplates.lua:411
UpdateFrameStrata = defined @Interface/FrameXML/ActionBar.lua:194
UpdateButtonArt = defined @Interface/FrameXML/EditModeSystemTemplates.lua:669
IsFrameAnchoredToMe = defined @Interface/FrameXML/EditModeSystemTemplates.lua:469
buttonTemplate = "MainBarActionBarButtonTemplate"
ShowBase = defined =[C]:-1
IsShown = defined @Interface/FrameXML/ActionBar.lua:286
GetSelectionOffset = defined @Interface/FrameXML/EditModeSystemTemplates.lua:363
ResetToDefaultPosition = defined @Interface/FrameXML/EditModeSystemTemplates.lua:148
RefreshButtonArt = defined @Interface/FrameXML/EditModeSystemTemplates.lua:662
GetScaledSelectionSides = defined @Interface/FrameXML/EditModeSystemTemplates.lua:355
SelectSystem = defined @Interface/FrameXML/EditModeSystemTemplates.lua:534
buttonArtDirty = false
GetFrameMagneticEligibility = defined @Interface/FrameXML/EditModeSystemTemplates.lua:489
AddLayoutChildren = defined @Interface/SharedXML/LayoutFrame.lua:48
IsBelowFrame = defined @Interface/FrameXML/EditModeSystemTemplates.lua:322
UpdateSystemSettingIconSize = defined @Interface/FrameXML/EditModeSystemTemplates.lua:714
SetScaleBase = defined =[C]:-1
HasActiveChanges = defined @Interface/FrameXML/EditModeSystemTemplates.lua:244
GetScaledCenter = defined @Interface/FrameXML/EditModeSystemTemplates.lua:348
DoesSettingDisplayValueEqual = defined @Interface/FrameXML/EditModeSystemTemplates.lua:268
OnLoad = defined @Interface/FrameXML/MainMenuBar.lua:6
UpdateDisplayInfoOptions = defined @Interface/FrameXML/EditModeSystemTemplates.lua:279
ActionBarPageNumber = Frame {
}
settingDisplayInfoMap =

{
}
addSystemIndexToName = true
IsLayoutFrame = defined @Interface/SharedXML/LayoutFrame.lua:36
DoesSettingValueEqual = defined @Interface/FrameXML/EditModeSystemTemplates.lua:263
MarkDirty = defined @Interface/SharedXML/LayoutFrame.lua:90
ShouldResetSettingsDialogAnchors = defined @Interface/FrameXML/EditModeSystemTemplates.lua:91
dirtySettings = {