The Terminal Services Gateway service does not have sufficient permissions to access the Secure Sockets Layer (SSL) certificate ...

The Terminal Services Gateway service does not have sufficient permissions to access the Secure Sockets Layer (SSL) certificate that is required to accept connections. To resolve this issue, bind (map) a valid SSL certificate by using TS Gateway Manager. For more information, see "Obtain a certificate for the TS Gateway server" in the TS Gateway Help. The following error occurred: "%2".