Paper just suddenly stopped working. It wouldn't sync and repeatedly failed syncing. I quit paper and relaunched it.
Now I get "No Dropbox account found - Dropbox Paper uses your Dropbox desktop app to sign you in. To use Dropbox Paper, please sign in to your Dropbox account with the Dropbox desktop app and then hit “Retry”."
Dropbox is running (currently syncing files).
"Retry" just loops back to this same message after a few seconds.
Please help.