This error occurs when access to VyprVPN Self-Hosted Server is not enabled for your account. Usually this means you are on a VyprVPN for Business account but have not yet added a license for VyprVPN Self-Hosted Server in your account.
Please check here for more information on which accounts can register a VyprVPN Self-Hosted Server.
If you need any further assistance, please contact our 24/7 Customer Success Team, who would be glad to assist.