Problem syncing with my phone

Good morning,

I have:
1 reinstalled Joplin Deskot on my computer
2 Synced my notes via Dropbox
3 Installed Joplin on my smartphone

But how do I sync Joplin with Dropbox on my phone?
When I go to Configuration / Synchronization Target and select Dropbox
there are no fields that allow me to identify myself with my Dropbox account?

Thanks for your help

Charles

Have you tried using the sync wizard?