I know that I’m late to the conversation but I too would like to implement co-author plus with Old Paper. Or else achieve the same function of being able to create non-user author profiles for the sake of attributing article/post authorship to them. I have installed co-author plus, but the articles I’ve assigned to the new author still show up with the original author and bio.
If this issue has been resolved could someone please share the solution with me? It would be really helpful if I didn’t have to create a hundred dummy wordpress accounts in order to properly attribute authorship for all of the the guest posts on my online journal. Thanks!