July 10, 2019: Juicer has just learned that Facebook has invalidated our tokens. As a result, no Facebook sources can be added, and no one can sign in or register with Facebook (and no new Facebook posts can fetched). This should not affect existing Facebook posts on Juicer feeds.
We are currently reaching out to and working with Facebook to try to resolve this. Having Facebook work for our users is absolutely our top priority.
Please contact our Support team if you have any questions. This article will be updated as soon as we know more.