Since 2018-12-19, 19:13:00 UTC we're experiencing a higher rate of application errors in all regions due to an outage in AWS ECR.
We're investigating the issue and update this post once there.
We apologize for the inconvenience.
Update 19:30 UTC
This outage also affects the Developer Portal.
Update 20:05 UTC
As of 19:51 UTC the issue is resolved by Amazon