Skip directly to the demo: 0:30
For more details see the Knowledge Center article with this video: https://aws.amazon.com/premiumsupport/knowledge-center/aws-backup-encoded-authorization-failure/
Ryan shows you how to troubleshoot the encoded authorization failure message when you try to restore an Amazon EC2 instance using AWS Backup.
Duration: 00:02:45
Publisher: Amazon Web Services
You can watch this video also at the source.