the vendor Mistweaver Ai shows an empty inventory when the addon is enabled, even if set to show everything
without the addon she has several items for sale

the Warspear vendors of Seal of Tempered Fate are similarly showing empty

I recently looked at the mentioned vendors and noticed it was due to changes in how tooltips are scanned.

I hope that the latest update fixed this issue, and made the vendors usable again.

(On a side-note, searching will be fixed soon when I update the libraries to a newer version that also supports the tooltip changes.)