If you're on a VyprVPN for Business account, you will need to add a VyprVPN Self-Hosted Server license to your account in order to register a server. When registered from a VyprVPN for Business account, the server will have no limits on the number of concurrent VPN connections. You can add a license from the Subscriptions section of your Business account here. On a VyprVPN for Business account, only Owner and Admin users can register a VyprVPN Self-Hosted Server.
If you're on an individual VyprVPN account, you can register one VyprVPN Self-Hosted Server, with the server having a connection limit of 2. This means that you can have up to two devices actively connected to the server, and any 3rd attempt will fail until one of the initial 2 are disconnected.
If you need any further assistance, please contact our 24/7 Customer Success Team, who would be glad to assist.