When getting a cloak as a reward from handing in a quest, the following errors below occurred.

1x BetterWardrobe\Modules\Wardrobe-Appearances.lua:1399: attempt to index global 'inventoryTypes' (a nil value)
[string "@BetterWardrobe\Modules\Wardrobe-Appearances.lua"]:1399: in function OnEvent' [string "@BetterWardrobe\Modules\Core.lua"]:1340: in function ?'
[string "@tomtom\libs\CallbackHandler-1.0\CallbackHandler-1.0-7.lua"]:119: in function <...Tom\libs\CallbackHandler-1.0\CallbackHandler-1.0.lua:119>
[string "=[C]"]: ?
[string "@tomtom\libs\CallbackHandler-1.0\CallbackHandler-1.0-7.lua"]:29: in function <...Tom\libs\CallbackHandler-1.0\CallbackHandler-1.0.lua:25>
[string "@tomtom\libs\CallbackHandler-1.0\CallbackHandler-1.0-7.lua"]:64: in function `Fire'
[string "@tomtom\libs\AceEvent-3.0\AceEvent-3.0-4.lua"]:120: in function <...aceTomTom\libs\AceEvent-3.0\AceEvent-3.0.lua:119>

1x [ADDON_ACTION_BLOCKED] AddOn 'BetterWardrobe' tried to call the protected function 'MountJournal:SetShown()'.
[string "@!BugGrabber\BugGrabber.lua"]:519: in function <!BugGrabber\BugGrabber.lua:519>
[string "=[C]"]: in function SetShown' [string "@Blizzard_Collections\Blizzard_Collections-1.0.lua"]:49: in function CollectionsJournal_UpdateSelectedTab'
[string "@Blizzard_Collections\Blizzard_Collections-1.0.lua"]:6: in function CollectionsJournal_SetTab' [string "@BetterWardrobe\Modules\Wardrobe-Appearances.lua"]:1939: in function CheckLatestAppearance'
[string "@BetterWardrobe\Modules\Wardrobe-Appearances.lua"]:1921: in function <BetterWardrobe\Modules\Wardrobe.lua:1904>

I got something similar with a different line, but including the Tomtom mention, so maybe related.

1x BetterWardrobe\Modules\Wardrobe-Appearances.lua:1339: attempt to index global 'inventoryTypes' (a nil value) [string "@BetterWardrobe\Modules\Wardrobe-Appearances.lua"]:1339: in function OnEvent'
[string "@BetterWardrobe\Modules\Core.lua"]:1360: in function ?' [string "@TomTom\libs\CallbackHandler-1.0\CallbackHandler-1.0-7.lua"]:119: in function <...Tom\libs\CallbackHandler-1.0\CallbackHandler-1.0.lua:119> [string "=[C]"]: ? [string "@TomTom\libs\CallbackHandler-1.0\CallbackHandler-1.0-7.lua"]:29: in function <...Tom\libs\CallbackHandler-1.0\CallbackHandler-1.0.lua:25> [string "@TomTom\libs\CallbackHandler-1.0\CallbackHandler-1.0-7.lua"]:64: in function Fire'
[string "@tomtom\libs\AceEvent-3.0\AceEvent-3.0-4.lua"]:120: in function <...aceTomTom\libs\AceEvent-3.0\AceEvent-3.0.lua:119>`