This incident has been resolved.

We are now observing healthy responses for requests routed through CloudFront, and the UI should be accessible across regions. The team is still monitoring this. Latest update from AWS (11:16 AM UTC): https://health.aws.amazon.com/health/status

AWS is investigating the issue with Amazon CloudFront. For further details, please refer to the AWS STATUS PAGE: https://health.aws.amazon.com/health/status

Current logs show that none of the backend processes are impacted. We are currently investigating the issue with UI.