Hi!
I cant equip Voldrethar, Dark Blade of Oblivion (http://wotlk.cavernoftime.com/item=45516).
Every time I try to equip the weapon, it says, it is not there. When you check the item, it shows a question mark.
Expansion: Expansion WoLK (New)
Operating system: MacOs High Sierra
Try deleting your cache, and then upon login idle for a few minutes. If that doesn't work try downloading a fresh install and log in using that without any addons.
This bug is usually from a corrupted cache or game files.