WP backup doesn't allow me to set up

I clicked the authorization button on my webpage dashboard. This took me to WP and I signed up for an account. Now I go back to the dashboard and whether I click on the main link, the settings or the backup monitor I still get the authorization button.

When I click on that it take me to my Dropbox page. I understand how to put files into dropbox but can’t for the life of me figure out how to back up my WP site.

Any assistance would be greatly appreciated.

https://wordpress.org/plugins/wordpress-backup-to-dropbox/