This version of Unity is unsupported.
Method group is Obsolete

NetworkTransport.DisconnectNetworkHost

Obsolete public static void DisconnectNetworkHost(int hostId, out byte error);

Parameters

hostId Host ID associated with this connection.
error Error (can be cast to NetworkError for more information).

Description

This will disconnect the host and disband the group. DisconnectNetworkHost can only be called by the group owner on the relay server.