Error when trying to run Config_runbackfill pipeline on an MCA account

I have a client with an MCA account who have deployed the FinOps Hub. When they're trying to run the Config_runbackfill pipeline, they keep getting this error. They have assigned all the necessary permissions to the managed identities

{"error":{"code":"RBACAccessDenied","message":"The client does not have authorization to perform action. Request ID: NoHttpContext"}}

Start by reproducing the Config_runbackfill pipeline for an MCA account and inspect the reported RBACAccessDenied error. Review the permissions assigned to the managed identities and compare them with the authorization required by the pipeline. Done means the pipeline runs successfully for the reported account or the missing authorization requirement is identified.