As seen in https://docs.aws.amazon.com/general/latest/gr/aws-ip-ranges.html#subscribe-notifications the SNS subscription should always be done in the us-east-1 zone, thus the --region us-east-1 parameter specification should be added to the subscription command in README
As seen in https://docs.aws.amazon.com/general/latest/gr/aws-ip-ranges.html#subscribe-notifications the SNS subscription should always be done in the
us-east-1zone, thus the--region us-east-1parameter specification should be added to the subscription command in README