As of 12:08 pm Pacific on Friday, Discord was investigating errors preventing some users to connect to the chat application. At 12:24, Discord said it had identified the issue: "Many users are unable to start their sessions at this time."
If you already had Discord open, you may not notice the downtime, but those booting it up may be unable to connect.
We've tested out Discord on our own machines and noticed that we get an error while trying to load friends' profiles, presumably due to the API issues. If you see "Unable to load parts of profile" while clicking someone's avatar, you're in the same boat. Connecting to some servers is also giving us a familiar red "Messages failed to load " error.
Developing...