Configuration issue when setting up a single-node cluster on AWS RHEL

As part of an investigation into openshift, I am trying to set up a single node openshift cluster on an AWS RHEL 8 EC2 instance. I am trying to configure the subscription manager on this instance and even though I have my RedHat customer account 'simple content access for subscription management' enabled, I get the following when trying to attach any subscription pool available,

subscription-manager attach --pool=2c948b67857d2c470185810544d62665
Ignoring request to attach. It is disabled for org "16633586" because of the content access mode setting

Any suggestions on how to resolve?