After clicking the Castle Nathria weakauras to change its settings, the Weakauras options pane was covering the auras, so I tried to move it and got the following error:

2x ...dOns\WeakAurasOptions\OptionsFrames\OptionsFrame.lua:237: attempt to perform arithmetic on a nil value
[string "@WeakAurasOptions\OptionsFrames\OptionsFrame.lua"]:237: in function <...dOns\WeakAurasOptions\OptionsFrames\OptionsFrame.lua:236>
[string "@WeakAurasOptions\OptionsFrames\OptionsFrame.lua"]:264: in function <...dOns\WeakAurasOptions\OptionsFrames\OptionsFrame.lua:262>

Locals:
(*temporary) = nil
(*temporary) = 2100.512939
(*temporary) = 2100.512939
(*temporary) = nil
(*temporary) = nil
(*temporary) = nil
(*temporary) = nil
(*temporary) = nil
(*temporary) = nil
(*temporary) = "attempt to perform arithmetic on a nil value"
frame = WeakAurasOptions {
0 =
texturePicker =

{
}
HideTip = defined @WeakAurasOptions\OptionsFrames\OptionsFrame.lua:513
CenterOnPicked = defined @WeakAurasOptions\OptionsFrames\OptionsFrame.lua:1246
window = "default"
OnBackdropLoaded = defined @SharedXML\Backdrop.lua:195
ClearOptions = defined @WeakAurasOptions\OptionsFrames\OptionsFrame.lua:830
GetBackdropColor = defined @SharedXML\Backdrop.lua:433
EnsureOptions = defined @WeakAurasOptions\OptionsFrames\OptionsFrame.lua:895
PickDisplayMultiple = defined @WeakAurasOptions\OptionsFrames\OptionsFrame.lua:1262
RightEdge = {
}
importexport = {
}
ClearBackdrop = defined @SharedXML\Backdrop.lua:325
importThumbnail = {
}
ShowTip = defined @WeakAurasOptions\OptionsFrames\OptionsFrame.lua:506
ClearPick = defined @WeakAurasOptions\OptionsFrames\OptionsFrame.lua:979
SetupTextureCoordinates = defined @SharedXML\Backdrop.lua:257
TopRightCorner = {
}
iconPicker = {
}
GetEdgeSize = defined @SharedXML\Backdrop.lua:231
UpdateFrameVisible = defined @WeakAurasOptions\OptionsFrames\OptionsFrame.lua:275
TopEdge = {
}
mover = {
}
bottomLeftResizer = {
}
BottomRightCorner = {
}
SetBackdropColor = defined @SharedXML\Backdrop.lua:442
LeftEdge = {
}
unloadedButton = {
}
buttonsContainer = {
}
tipFrame = {
}
toolbarContainer = {
}
codereview = {
}
SetBackdropBorderColor = defined @SharedXML\Backdrop.lua:465
container = {
}
loadProgress = {
}
BottomEdge = {
}
SetBackdrop = defined @SharedXML\Backdrop.lua:372
texteditor = {
}
GetBackdropBorderColor = defined @SharedXML\Backdrop.lua:452
GetBackdrop = defined @SharedXML\Backdrop.lua:390
backdropInfo = {
}
moversizer = {
}
SetBorderBlendMode = defined @SharedXML\Backdrop.lua:309
pickedDisplay = "Castle Nathria (wago.io/slraid1)"
PickDisplay = defined @WeakAurasOptions\OptionsFrames\OptionsFrame.lua:1189
loadProgressNum = 627
tipFrameIsVisible = true
SetLoadProgressVisible = defined @WeakAurasOptions\OptionsFrames\OptionsFrame.lua:635
FillOptions = defined @WeakAurasOptions\OptionsFrames\OptionsFrame.lua:924
addonsButton = {
}
Center = {
}
OnBackdropSizeChanged = defined @SharedXML\Backdrop.lua:225
loadProgessVisible = false
filterInput = WeakAurasFilterInput {
}
GetPickedDisplay = defined @WeakAurasOptions\OptionsFrames\OptionsFrame.lua:1305
buttonsScroll = {
}
BottomLeftCorner = {
}
PickDisplayBatch = defined @WeakAurasOptions\OptionsFrames\OptionsFrame.lua:1286
modelPicker = {
}
loadedButton = {
}
TopLeftCorner = {
}
PickOption = defined @WeakAurasOptions\OptionsFrames\OptionsFrame.lua:1163
NewAura = defined @WeakAurasOptions\OptionsFrames\OptionsFrame.lua:1034
bottomRightResizer = {
}
ClearPicks = defined @WeakAurasOptions\OptionsFrames\OptionsFrame.lua:998
ApplyBackdrop = defined @SharedXML\Backdrop.lua:337
UpdateOptions