As you are probably aware, GoCardless recently released their new dashboard which has been rolling out to all users since April 2016. You can read about the changes they have made in more detail on their website: https://gocardless.com/blog/introducing-your-new-gocardless-dashboard/.
As part of the update they have unfortunately removed functionality for importing existing pre-authorisations from your GoCardless account into Clear Books. This change affects two features that were previously available in Clear Books:
Importing a single existing pre-authorisation
Importing a CSV containing a list of existing pre-authorisations
If you are using the new version of the GoCardless dashboard then these features won't be working in Clear Books. Therefore, we have taken the decision to remove the features from our application. If we hear any news from GoCardless regarding this update that could allow us to re-enable these features in the future, we'll be sure to let you know.