I noticed on April 9 that Empathy wasn't connecting to Facebook Chat, so I opened Online Accounts, and it appears that I needed to authorize Ubuntu to access Facebook. But then I couldn't do that - when I try, the web server at Facebook responds with
"Facebook Error Accessing App We're sorry, but the application you're trying to use doesn't exist or has been disabled."
I tried removing and adding the Facebook account again, and got the same result.
Does anyone know if Facebook shut down the authentication app due to the Heartbleed bug? If so, any word on when it will be back up again?