For developers, see https://github.com/Stanzilla/WoWUIBugs/wiki/9.0.1-Consolidated-UI-Changes#backdrop-system-changes

3x ...dOns\SavedInstances\Libs\LibQTip-1.0\LibQTip-1.0-47.lua:540: attempt to call method 'SetBackdrop' (a nil value)
[string "@SavedInstances\Libs\LibQTip-1.0\LibQTip-1.0-47.lua"]:540: in function <...dOns\SavedInstances\Libs\LibQTip-1.0\LibQTip-1.0.lua:534>
[string "@SavedInstances\Libs\LibQTip-1.0\LibQTip-1.0-47.lua"]:127: in function Acquire' [string "@Decursive\Dcr_DebuffsFrame.lua"]:797: in function OnEnter'
[string ":OnEnter"]:1: in function <[string ":OnEnter"]:1>

Locals:
tooltip = {
0 =
scrollChild = {
}
scrollFrame = {
}
}
key = "DecursiveMUFToolTip"
backdrop =

{
backdropColor = {
}
bgFile = "Buttons\WHITE8X8"
tile = false
backdropBorderColor = {
}
tileSize = 16
edgeFile = "Tooltips\UI-Tooltip-Border"
tileEdge = false
edgeSize = 14
insets = {
}
}
(*temporary) = nil
(*temporary) = {
0 =
scrollChild = {
}
scrollFrame = {
}
}
(*temporary) = {
backdropColor = {
}
bgFile = "Buttons\WHITE8X8"
tile = false
backdropBorderColor = {
}
tileSize = 16
edgeFile = "Tooltips\UI-Tooltip-Border"
tileEdge = false
edgeSize = 14
insets = {
}
}
(*temporary) = "attempt to call method 'SetBackdrop' (a nil value)"
GameTooltip = GameTooltip {
0 =
SetQuestLogRewardSpell = defined @TheUndermineJournal\libs\LibExtraTip\LibExtraTip.lua:419
OnBackdropLoaded = defined @SharedXML\Backdrop.lua:205
ItemTooltip = {
}
SetHyperlink = defined @TheUndermineJournal\libs\LibExtraTip\LibExtraTip.lua:419
SetVoidDepositItem = defined @TradeSkillMaster\LibTSM\Service\ItemTooltipClasses\Wrapper.lua:96
SetVoidWithdrawalItem = defined @TradeSkillMaster\LibTSM\Service\ItemTooltipClasses\Wrapper.lua:96
ClearBackdrop = defined @SharedXML\Backdrop.lua:335
Show = defined =[C]:-1
SetPetAction = defined @TheUndermineJournal\libs\LibExtraTip\LibExtraTip.lua:419
SetLootItem = defined @TheUndermineJournal\libs\LibExtraTip\LibExtraTip.lua:419
FadeOut = defined @tiptac\ttCore.lua:853
SetRecipeReagentItem = defined @TheUndermineJournal\libs\LibExtraTip\LibExtraTip.lua:419
SetBuybackItem = defined @TheUndermineJournal\libs\LibExtraTip\LibExtraTip.lua:419
SetMerchantItem = defined @TheUndermineJournal\libs\LibExtraTip\LibExtraTip.lua:419
SetupTextureCoordinates = defined @SharedXML\Backdrop.lua:267
TopRightCorner = {
}
SetTalent = defined @TheUndermineJournal\libs\LibExtraTip\LibExtraTip.lua:419
ttIcon = {
}
GetEdgeSize = defined @SharedXML\Backdrop.lua:241
updateTooltip = 0.200000
SetInventoryItem = defined @TheUndermineJournal\libs\LibExtraTip\LibExtraTip.lua:419
TopEdge = {
}
ttCount = {
}
SetLootRollItem = defined @TheUndermineJournal\libs\LibExtraTip\LibExtraTip.lua:419
SetAuctionSellItem = defined @TheUndermineJournal\libs\LibExtraTip\LibExtraTip.lua:419
SetBagItem = defined @TheUndermineJournal\libs\LibExtraTip\LibExtraTip.lua:419
BottomRightCorner = {
}
SetBackdropColor = defined @SharedXML\Backdrop.lua:452
LeftEdge = {
}
SetAuctionItem = defined @TheUndermineJournal\libs\LibExtraTip\LibExtraTip.lua:419
textLeft1Font = "GameTooltipHeaderText"
SetCurrencyToken = defined @TheUndermineJournal\libs\LibExtraTip\LibExtraTip.lua:419
SetGuildBankItem = defined @TheUndermineJournal\libs\LibExtraTip\LibExtraTip.lua:419
SetVoidItem = defined @TradeSkillMaster\LibTSM\Service\ItemTooltipClasses\Wrapper.lua:96
TopLeftCorner = {
}
SetQuestRewardSpell = defined @TheUndermineJournal\libs\LibExtraTip\LibExtraTip.lua:419
textRight2Font = "GameTooltipText"
ApplyBackdrop = defined @SharedXML\Backdrop.lua:347
SetBackdrop = defined @SharedXML\Backdrop.lua:382
TopOverlay = {
}
GetBackdropBorderC