Ads Not showing

I get the same thing showing oops no results showing, I have added a field ebay_search and given it a value of (in my case) Banksy Wall Vinyl.
you can see here the results
http://banksywallvinyl.co.uk/banksy-wall-vinyl/

the others with same problem do not seem to have solutions shown in the thread?

https://wordpress.org/plugins/wp-ebay-ads/