I was formatting a document that was initially written by a colleague, who started using paperpile after I introduced it to him. However, when I tried to format the citation, I got the above error message for the first time in the few years I used paperpile. Thinking this might be related to the original google doc was written by the colleague, I copied the content to a new file but got the same message. I then started a new gdoc with one newly inserted ref and got the same message. I even uninstalled the plugin and extension but still got the same error messge. I am thinking I might need to get rid of the local cache but not sure where that is. Please help!