Cannot link my form to dropbox

I'm wanting to link my form to my dropbox account. I have followed the guidelines and pressed the button to link the two. However, I am just returned to the get started box. When i click next it says i have not been authenticated 

I created a clone of the form and could Integrate successfully with Dropbox:

Are you experiencing this difficulty with more than one browser? You may try clearing your browser's cache to see if it helps. 

Also are you able to log in to your Dropbox account?

Let us know if the problem persists.

Thank you