Error while launching duet

[nidhitiwari11998]

I am writing below line to launch the duet server
duet = sy.launch_duet()
but it is showing error. The error is given as :
ConnectionError: HTTPSConnectionPool(host='raw.githubusercontent.com', port=443): Max retries exceeded with url: /OpenMined/OpenGridNodes/master/network_address (Caused by NewConnectionError('<urllib3.connection.HTTPSConnection object at 0x0000025255D40D00>: Failed to establish a new connection: [WinError 10060] A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond'))

What should I do?