GitHub has resolved the issue. If you continue experiencing authentication issues with the Dashboard, please reach out to our support team.
Posted Feb 27, 2020 - 19:00 UTC
GitHub has announced a resolution to the increased error rate they reported earlier today. Authenticating into the Dashboard via GitHub may continue to fail intermittently while GitHub recovers. Authentication via Google and SSO continues to work as expected. We're monitoring GitHub's recovery.
We're seeing occasional errors when attempting to log in via GitHub. GitHub has opened an incident to investigate elevated error rates across GitHub.com. The Dashboard UI and CI recording are not impacted by this issue.