I'm trying to do the Linux headless install as described at https://www.dropbox.com/install on an Ubuntu 16.04 workstation. It works until I get to the point in the instructions that say "If you're running Dropbox on your server for the first time, you'll be asked to copy and paste a link in a working browser to create a new account or add your server to an existing account."
I don't get any notice of the URL to use. The last thing I see when I start dropboxd from my command line is "Opening in existing browser session" -- but no URL is provided.