To resolve this problem, set the Remote Desktop Gateway service to start automatically. 1. Open services.msc on server. 2. ...

To resolve this problem, set the Remote Desktop Gateway service to start automatically.
  1. Open services.msc on server.
  2. Right-click the Remote Desktop Gateway service, and then click Properties.
  3. On the General tab, change the Startup type to Automatic (Delayed Start), and then click OK.