Hmm, Patreon’s API could be experiencing some downtime. Possibly try again tomorrow to see if it works again.
Edit: It looks like Patreon broke their v1 API which we depend on with no notice, and since it’s deprecated they apparently have no intention to fix it. We’re going to look into migrating to their new API but it may take some time because the way they represent campaigns and backers is substantially different. See my post above