Cause : This might occur when there is an issue on your network.
1. Go to Start > Run > “cmd” > enter “ telnet 220.127.116.11 443 ”.
2. If the connection is available, screen will be cleaned up. Press Enter to go back to the prompt.
3. If the connection is not available, an error message will be prompted on the screen. Contact your network administrator to allow connection to 18.104.22.168 on port 443.
NOTE : to enable TELNET client, select the option in Control Panel > Program > Windows Features.