Hi Remainders,
We just conducted a category update last Thursday so, if you are receiving that message when you open your existing saved listings, it is most likely that the category you selected is no longer a valid eBay category. However, if you are receiving this error when creating new listings with categories selected from our "Browse" or "Search" tools, this is something we'd need to investigate further.
Also, I'm not aware of any problems that occurred yesterday that should have prevented you from being able to use the "Find Product" option. If you are still experiencing technical difficulties when trying to use that functionality, please contact our customer support department about that issue as well.
If you feel that the error message you are receiving is being generated in error, please contact our customer support team using the appropriate link on our help page:
http://www.auctiva.com/free-auction-software-help/help.aspx-Mike