When I (accidentally) tried to anchor my target frame to my party frame (which I have disabled), the following error popped up:

Message: Interface\AddOns\LunaUnitFrames\modules\movers.lua:304: attempt to index local 'anchor' (a nil value)
Time: Sat Jul 6 08:49:10 2019
Count: 3
Stack: Interface\AddOns\LunaUnitFrames\modules\movers.lua:304: attempt to index local 'anchor' (a nil value)
Interface\AddOns\LunaUnitFrames\modules\movers.lua:304: in function SetFrame' Interface\AddOns\LunaUnitFrames\modules\options.lua:341: in function <Interface\AddOns\LunaUnitFrames\modules\options.lua:331> [C]: ? ...ceConfig\AceConfigDialog-3.0\AceConfigDialog-3.0.lua:50: in function <...ceConfig\AceConfigDialog-3.0\AceConfigDialog-3.0.lua:48> ...ceConfig\AceConfigDialog-3.0\AceConfigDialog-3.0.lua:789: in function <...ceConfig\AceConfigDialog-3.0\AceConfigDialog-3.0.lua:610> [C]: ? ...terface\AddOns\Masque\Libs\AceGUI-3.0\AceGUI-3.0.lua:71: in function <...terface\AddOns\Masque\Libs\AceGUI-3.0\AceGUI-3.0.lua:69> ...terface\AddOns\Masque\Libs\AceGUI-3.0\AceGUI-3.0.lua:285: in function Fire'
...icRace\libs\AceGUI\widgets\AceGUIWidget-DropDown.lua:442: in function <...icRace\libs\AceGUI\widgets\AceGUIWidget-DropDown.lua:433>
[C]: ?
...terface\AddOns\Masque\Libs\AceGUI-3.0\AceGUI-3.0.lua:71: in function <...terface\AddOns\Masque\Libs\AceGUI-3.0\AceGUI-3.0.lua:69>
...terface\AddOns\Masque\Libs\AceGUI-3.0\AceGUI-3.0.lua:285: in function `Fire'
...s\AceGUI-3.0\widgets\AceGUIWidget-DropDown-Items.lua:351: in function <...s\AceGUI-3.0\widgets\AceGUIWidget-DropDown-Items.lua:341>

Locals: