I have re-installed the Songbook Android app on my Samsung digital tablet. Trying to synchronize the app with Dropbox with the Songbook feature (it worked before the re-install).
The Songbook App has a "link with Dropbox" set up feature that is just asking for mail + password. When I give these info (these are indeed the correct data) I get a message asking to please key-in a valid email address ("Veuillez saisir une adresse email valide", in French).
I tried this many times, checked the Internet connexion, checked the password on Dropbox site... no way to get things done.