Webber's Wonders - Can't purchase Black Robes

[The Artist]

When interacting with the Black Robes of the Magi in Webber's Wonders, no conversation fires, preventing them from being purchased.

[The Artist]

Garden Ranger's Leather Wear, Troubadour's Leather, and Vestments of the Mudlark Mage also all appear to have the same issue.