If you have a valid software subscription, the subscription covers your use of the software, precisely the specific server-side package for which you have purchased a subscription plus any client-side related issues.

If you have a valid NoMachine Network subscription, this covers your use of the Network subscription i.e the NoMachine Network connection. 

All customers with valid subscriptions can open support enquiries from their User Area.  For detailed terms and conditions, please consult the NoMachine Subscription and Support Agreement: https://www.nomachine.com/licensing/nomachine-subscription-and-support-agreement.