I have an application that has worked correctly for years, but it stopped working 2 days ago.
findItemsByProduct suddenly will not accept a UPC (although it will still work using an ePID).
<findItemsByProductResponse xmlns="http://www.ebay.com/marketplace/search/v1/services"><ack>Failure</ack><errorMessage><error><errorId>41</errorId><domain>Marketplace</domain><severity>Error</severity><category>Request</category><message>Invalid product ID value.</message><subdomain>Search</subdomain><parameter>0054727750526</parameter></error></errorMessage><version>1.13.0</version><timestamp>2021-08-14T13:53:16.060Z</timestamp></findItemsByProductResponse>
I have tried different UPCs, same error result.
Not sure what is going on here, but I need to get this addressed. I didn't make any changes on my end, as I said it has been working properly for years, but 2 days ago it just stopped.
Can I only report this kind of issue to technical support by purchasing premium support hours and explaining it there?