Thanks, hexello. I was able to fix this by adding the role in Role Manager, as you suggested. I appreciate your help!
I still haven’t been successful in fixing this issue. Authors (and a custom role I have set up) still continue to get “-1” instead of a list of tags. Anyone have any ideas?
I’m having the same issue. Are you using Role Manager? I am, and have been wondering if this could be part of the issue.