On Retail, with v4.7 of BetterWardrobe, I am getting an error when toggling back and forth between the list and "visual" view on the "Saved" sets tab.

2x BetterWardrobe/Modules/Wardrobe.lua:7554: attempt to call global 'WardrobeCollectionFrame_UpdateProgressBar' (a nil value)
[string "@BetterWardrobe/Modules/Wardrobe.lua"]:7554: in function <BetterWardrobe/Modules/Wardrobe.lua:7493>

Locals:
self = BetterWardrobeVisualToggle {
0 =
OnEnter = defined @BetterWardrobe/Modules/Wardrobe.lua:7567
viewAll = true
VisualMode = true
OnHide = defined @BetterWardrobe/Modules/Wardrobe.lua:7561
OnLeave = defined @BetterWardrobe/Modules/Wardrobe.lua:7573
OnClick = defined @BetterWardrobe/Modules/Wardrobe.lua:7493
texture = BetterWardrobeVisualToggleTexture {
}
}
baseFrame = nil
aCtrlKeyIsDown = false
atTransmogrifier = false
tab = 4
savedCount = 6
(*temporary) = nil
(*temporary) = 6
(*temporary) = 6
(*temporary) = "attempt to call global 'WardrobeCollectionFrame_UpdateProgressBar' (a nil value)"
addon =

{
TransmogVendorSizeUpdated = true
ViewDelay = 3
useAltSet = false
modules = {
}
Sort = {
}
SecureHook = defined @Ace3/AceHook-3.0/AceHook-3.0.lua:335
GetBlizzID = defined @BetterWardrobe/Data/DataBase.lua:426
MogIt = {
}
IsEnabled = defined @Ace3/AceAddon-3.0/AceAddon-3.0.lua:447
GetActiveCategory = defined @BetterWardrobe/Modules/CollectionList.lua:213
RefreshCharConfig = defined @BetterWardrobe/Modules/Core.lua:1139
RegisterMessage = defined @Ace3/CallbackHandler-1.0/CallbackHandler-1.0.lua:80
UnregisterMessage = defined @Ace3/CallbackHandler-1.0/CallbackHandler-1.0.lua:143
validSetCache = {
}
GetBaseList = defined @BetterWardrobe/Data/DataBase.lua:410
db = {
}
SetEnabledState = defined @Ace3/AceAddon-3.0/AceAddon-3.0.lua:420
Hook = defined @Ace3/AceHook-3.0/AceHook-3.0.lua:273
InitExtendedSetsSwap = defined @BetterWardrobe/Plugins/ExtendedTransmog.lua:6
OnEnable = defined @BetterWardrobe/Modules/Core.lua:1230
GetSetSources = defined @BetterWardrobe/Modules/BlizzardAPI.lua:230
GetArtifactSourceInfo = defined @BetterWardrobe/Modules/ArtifactAppearances.lua:271
IsWeaponCat = defined @BetterWardrobe/Modules/CollectionList.lua:217
ItemAppearance = {
}
ClearArtifactData = defined @BetterWardrobe/Modules/ArtifactAppearances.lua:266
itemSourceID = {
}
ColorFilterButton = Button {
}
ColorFilterFrame = Button {
}
Globals = {
}
SortSet = defined @BetterWardrobe/Modules/SortingFunctions.lua:643
Deserialize = defined @Ace3/AceSerializer-3.0/AceSerializer-3.0.lua:246
SortDropdown = defined @BetterWardrobe/Modules/SortingFunctions.lua:657
GetName = defined @Ace3/AceAddon-3.0/AceAddon-3.0.lua:275
C_TransmogCollection = {
}
Camera = {
}
name = "BetterWardrobe"
UI = {
}
Disable = defined @Ace3/AceAddon-3.0/AceAddon-3.0.lua:310
GetSetType = defined @BetterWardrobe/Data/DataBase.lua:644
Unhook = defined @Ace3/AceHook-3.0/AceHook-3.0.lua:417
Print = defined @Ace3/AceConsole-3.0/AceConsole-3.0.lua:50
IsFavoriteItem = defined @BetterWardrobe/Modules/Wardrobe.lua:3493
usableSourceCache = {
}
ExtendTransmogView = defined @BetterWardrobe/Modules/TransmogVendor.lua:423
BuildClassArtifactAppearanceList = defined @BetterWardrobe/Modules/ArtifactAppearances.lua:176
Serialize = defined @Ace3/AceSerializer-3.0/AceSerializer-3.0.lua:122
Init = {
}
InitTooltips = defined @BetterWardrobe/Modules/Tooltips.lua:90
CreateChatLinkTransmogVendor = def