When attempting to update the subscription settings for a cluster with an owner account that has been disabled the error is confusing as it states there is no entitlement on the account and to contact sales. Requesting to have this error message updated to be more in line with the issue that is occurring. As a side request can the UI reflect when the cluster owner account is disabled maybe with this format so that it can be recognized before attempting to apply the subscription:

Owner 
John Do (account disabled)