CMMVC8743E The command failed because the region specified is not valid.
Explanation
An attempt was made to configure an Amazon Web Services (AWS) S3 cloud account, but the specified AWS region was not recognized.
User response
Retry the command with a valid region. To find a valid region, check the list of regions that are supported by AWS S3 on the AWS website:
https://aws.amazon.com/about-aws/global-infrastructure/regional-product-services/