rosa - x509: certificate signed by unknown authority

Hello,

When I am trying to follow https://aws.amazon.com/blogs/aws/red-hat-openshift-service-on-aws-now-generally-availably/ to setup openshift cluster on AWS, I am seeing the following error when I run rosa
ERR: Failed to get current account: can't send request: Get "https://api.openshift.com/api/accounts_mgmt/v1/current_account": x509: certificate signed by unknown authority

I am unable to create cluster. How to fix this error?

Thanks for your time