Hi am82,
If you open this saved listing and try posting it using the "Post" or "Schedule" button at the bottom of the listing creation page, a red box should appear at the top of the page with a description of what needs to be changed in order to post the listing successfully. The non-specific error just shows up when you try to post from the Saved Listings page.
If you need further assistance with this issue, please feel free to contact our customer support team using the web form on the following page of our site: http://www.auctiva.com/help/requesthelp.aspx
-Mike