Dropbox powerup doesn't work

[Marco Viale]

I'm business class user, I'm a dropbox advanced user so I have all the rights to activate power ups in Trello and to use Dropbox.

When I tried to link a Dropbox folder to a card in Trello the system returned me de message "impossible to send the message to host site" and it doesn't link the folder to card.

What can I do?

[natasha]

Having the same problem over the last two weeks.  Our organisation has SSO for Dropbox and it is now consistently failing every single time I try to add a Dropbox file or folder in Trello - which requires authentication each and every time.