We have deployed an update to resolve this issue. S3 related signatures are now functioning in within GovCloud. If you have any issues please contact our support team at email@example.com
Posted about 2 months ago. Feb 01, 2018 - 15:56 PST
We are engaged with AWS, investigating potential issues around role assumption in GovCloud.
Posted 8 months ago. Jul 20, 2017 - 17:52 PDT
We are investigating an issue with our GovCloud S3-related signatures. All signatures for S3 are currently reporting an error state. We will update this incident as soon as we have further information.