Issue with auction house and Zygor guide

[kristiofca]

Keep receiving messages to reload the ui, then getting this while trying to sell in the auction house:
Error during initialization sequence 'NC startup':
...erface/AddOns/ZygorGuidesViewer/CreatureDetector.lua:41: attempt to index field 'Popup' (a nil value)
-- STARTUP THREAD STACK: --
@Interface/AddOns/ZygorGuidesViewer/CreatureDetector.lua:41: in function `AddGuideToDetectedGuides'
@Interface/AddOns/ZygorGuidesViewer/NotificationCenter.lua:608: in function `AddedSavedNotifications'
@Interface/AddOns/ZygorGuidesViewer/NotificationCenter.lua:72: in function `DoStartup'
@Interface/AddOns/ZygorGuidesViewer/NotificationCenter.lua:806: in function `func'
@Interface/AddOns/ZygorGuidesViewer/ZygorGuidesViewer.lua:697: in function <...rface/AddOns/ZygorGuidesViewer/ZygorGuidesViewer.lua:697>
ZGV v9.0.28231, WoW v10.0.2.46801

[ZG Support 1]

Try doing a full guide reset.

1. exit WoW
2. go to the WoW/_retail_/Interface/Addons folder and delete any Zygor folders
3. go to the WoW/_retail_/WTF/Account/<your account name here>/SavedVariables folder and delete the Zygor files in there
4. run the desktop client and install a fresh copy of the guides
5. go back in game to test and see if that fixed it