Lately, after calling GetSingleItem in the Shopping API, I've been getting error code 1.33 . It's not listed in the docs. Does anyone know what it means?
Thankfully I'm only seeing it a small percentage of the time. It's hard to reproduce, so difficult to troubleshoot. But to start I need to know what the error code means.
(If it matters, I'm still using AppID authentication, but plan to shift to OAuth soon. Sounds like I have until end of June to make the conversion.)