Can't refresh gravatars after rebuilding the app

Running 2.8.0.beta11(8cfd791e0f) So everything was working fine. And then I did an app rebuild and now Gravatars are missing. Going into user-profile and then clicking refresh doesn’t do anything. However Gravatars work for new user registrations. Where can I look to troubleshoot further?


We had an ongoing outage due to a fire at a datacenter that affected Avatars. You may wish to try again.

Was that the gravatar server? Curious to know what external services Discourse software depends on.