WowAce

Since Dragonflight, the edit mode of Blizzard's UI does not allow the saving of changes if the Shadowed Unit Frames addon is enabled.

Seems to be an issue present for many in the comments and in this issues log.

Let me know if I can help to resolve, thank you for the addon!

Please fix this :)

the problem persists, pls fix this! I have to disable SUF everytime I need to change something on Blizz UI

Same issue occurs with me, if I disable SUF, I am able to go into edit mode and move things around, however when re-enabled, I get the following LUA error when trying to move things in edit mode. 

Message: Interface/FrameXML/EditModeSystemTemplates.lua:535: attempt to perform arithmetic on local 'left' (a nil value)
Time: Wed Dec 27 15:04:38 2023
Count: 1
Stack: Interface/FrameXML/EditModeSystemTemplates.lua:535: attempt to perform arithmetic on local 'left' (a nil value)
[string "@Interface/FrameXML/EditModeUtil.lua"]:130: in function `GetEligibleMagneticFrames'
[string "@Interface/FrameXML/EditModeUtil.lua"]:283: in function `FindMagneticFrames'
[string "@Interface/FrameXML/EditModeUtil.lua"]:367: in function `GetMagneticFrameInfo'
[string "@Interface/FrameXML/EditModeManager.lua"]:1063: in function `RefreshSnapPreviewLines'
[string "@Interface/FrameXML/EditModeManager.lua"]:170: in function <Interface/FrameXML/EditModeManager.lua:168>

Locals: self = <table> {
uiParentTop = 1200
UpdateUIParentPoints = <function> defined @Interface/FrameXML/EditModeUtil.lua:80
magneticGridLines = <table> {
}
GetEligibleMagneticFrames = <function> defined @Interface/FrameXML/EditModeUtil.lua:122
uiParentBottom = 0
uiParentRight = 2880.000244
ShouldReplaceClosestCorner = <function> defined @Interface/FrameXML/EditModeUtil.lua:226
ApplyMagnetism = <function> defined @Interface/FrameXML/EditModeUtil.lua:400
magneticFrames = <table> {
}
UnregisterFrame = <function> defined @Interface/FrameXML/EditModeUtil.lua:102
uiParentWidth = 2880.000244
RegisterGrid = <function> defined @Interface/FrameXML/EditModeUtil.lua:106
GetMagneticFrameInfo = <function> defined @Interface/FrameXML/EditModeUtil.lua:366
uiParentHeight = 1200
UnregisterGrid = <function> defined @Interface/FrameXML/EditModeUtil.lua:110
uiParentCenterX = 1440.000122
GetMagneticFrameInfoTable = <function> defined @Interface/FrameXML/EditModeUtil.lua:144
RegisterFrame = <function> defined @Interface/FrameXML/EditModeUtil.lua:98
RegisterGridLine = <function> defined @Interface/FrameXML/EditModeUtil.lua:114
uiParentCenterY = 600
GetMagneticCornerFrameInfo = <function> defined @Interface/FrameXML/EditModeUtil.lua:232
sqrMagnetismRange = 64
FindMagneticFrames = <function> defined @Interface/FrameXML/EditModeUtil.lua:282
magnetismRange = 8
uiParentLeft = 0
sqrCornerMagnetismRange = 128
CheckReplaceMagneticFrame = <function> defined @Interface/FrameXML/EditModeUtil.lua:148
IsPotentialMagneticCornerFrame = <function> defined @Interface/FrameXML/EditModeUtil.lua:222
SetMagnetismRange = <function> defined @Interface/FrameXML/EditModeUtil.lua:92
FindClosestLine = <function> defined @Interface/FrameXML/EditModeUtil.lua:162
}
systemFrame = CompactRaidFrameContainer {
0 = <userdata>
GetUnitFrame = <function> defined @Interface/AddOns/Blizzard_CompactRaidFrames/Blizzard_CompactRaidFrameContainer.lua:341
UpdateMagnetismRegistration = <function> defined @Interface/FrameXML/EditModeSystemTemplates.lua:731
GetSnapOffsets = <function> defined @Interface/FrameXML/EditModeSystemTemplates.lua:609
systemInfo = <table> {
}
IsFrameAnchoredToMe = <function> defined @Interface/FrameXML/EditModeSystemTemplates.lua:694
TrySetCompositeNumberSettingValue = <function> defined @Interface/FrameXML/EditModeSystemTemplates.lua:212
ApplyToFrames = <function> defined @Interface/AddOns/Blizzard_CompactRaidFrames/Blizzard_CompactRaidFrameContainer.lua:126
alwaysUseTopLeftAnchor = true
GetFixedSize = <function> defined @Interface/SharedXML/LayoutFrame.lua:156
breakSnappedFramesOnSave = true
resetToDefaultPositionButton = Button {
}
GetFixedWidth = <function> defined @Interface/SharedXML/LayoutFrame.lua:148
SetBorderShown = <function> defined @Interface/AddOns/Blizzard_CompactRaidFrames/Blizzard_CompactRaidFrameContainer.lua:121
UseCombinedGroups = <function> defined @Interface/FrameXML/EditModeSystemTemplates.lua:1110
ResetToDefaultPosition = <function> defined @Interface/FrameXML/EditModeSystemTemplates.lua:254
GetScaledSelectionSides = <function> defined @Interface/FrameXML/EditModeSystemTemplates.lua:532
SelectSystem = <function> defined @Interface/FrameXML/EditModeSystem