Cannot upload from Google Docs

Cannot upload from Google Docs

Whenever I try to upload a doc to my project from Google Docs, it gives this error:
Files with size equal to zero cannot be uploaded                 
                       
I suspect this is because I'm not choosing a file from my computer to upload in the "Browse" field. But obviously I don't want to do that since I've successfully selected a Google Doc from our library.

Am I doing something wrong?