I took a quick look at your feed file. Since I could not find any categories or play lists defined in your feed, I'll assume you've defined them in the developer portal. I did not, however, find an id that matches the message you are getting. There's a title with that string, but, not an id.
FREE Windows desktop software for converting Direct Publisher channels to SceneGraph (SDK), for creating BIF (Trick Play) files, Roku (MRSS, JSON) feed files, and FireTV feed files @ GitHub/rrirower.