After 9.1 addon just stopped working. No "Extra" and "Saved" windows. No large transmog window. Nothing. I updated it a few days ago, but nothing changed for me, so i started looking if some of my other addons are "blocking" better wardrobe. And it was Rarity. When I dissably Rarity, everything work (except some of the things below)
What else dost work:
-list of all covenant sets, even those that I own
-list of raid sets
-when I enable "Ignore class restriction" I can see in "Extra" sets for different class, but I cant equip them. I get LUA error like in picture

Thank you!

That should be fixed in the 3.1 update. Rarity loads the Blizzard Colllection addon when it loads which causes parts of my addon to trigger before it has fully initialized. I put a few checks in to hopefully prevent that from happening.