Solutionunvalidated

You have to explicitly specify those random digits. — BucketName: !Sub 's3-origin-chimesdk-workshops-${AWS::StackName}-${AWS::AccountId}-${!RandomDigits 3}'. Tension: There is no such thing as `${!RandomDigits 3}` in CloudFormation. Outcome: Your bucket name is incorrect.

db4c5090-1acb-4cec-9c4b-78166dcb19bd

You have to explicitly specify those random digits. — BucketName: !Sub 's3-origin-chimesdk-workshops-${AWS::StackName}-${AWS::AccountId}-${!RandomDigits 3}'. Tension: There is no such thing as ${!RandomDigits 3} in CloudFormation. Outcome: Your bucket name is incorrect.