Failed to dts init_sd_card

[jd110145derekParticipant]

I had tried to figure out problem on internet, but still failed
Could somebody help me!! \(TAT)/
##############################################################################
dts : Traceback (most recent call last):
: File “/usr/lib/python3/dist-packages/urllib3/connection.py”, line 141, in _new_conn
: (self.host, self.port), self.timeout, **extra_kw)
: File “/usr/lib/python3/dist-packages/urllib3/util/connection.py”, line 60, in create_connection
: for res in socket.getaddrinfo(host, port, family, socket.SOCK_STREAM):
: File “/usr/lib/python3.6/socket.py”, line 745, in getaddrinfo
: for res in _socket.getaddrinfo(host, port, family, type, proto, flags):
: socket.gaierror: [Errno -2] Name or service not known
:
: During handling of the above exception, another exception occurred:
:
: Traceback (most recent call last):
: File “/usr/lib/python3/dist-packages/urllib3/connectionpool.py”, line 601, in urlopen
: chunked=chunked)
: File “/usr/lib/python3/dist-packages/urllib3/connectionpool.py”, line 346, in _make_request
: self._validate_conn(conn)
: File “/usr/lib/python3/dist-packages/urllib3/connectionpool.py”, line 852, in _validate_conn
: conn.connect()
: File “/usr/lib/python3/dist-packages/urllib3/connection.py”, line 284, in connect
: conn = self._new_conn()
: File “/usr/lib/python3/dist-packages/urllib3/connection.py”, line 150, in _new_conn
: self, “Failed to establish a new connection: %s” % e)
: urllib3.exceptions.NewConnectionError: <urllib3.connection.VerifiedHTTPSConnection object at 0x7fc6d9c85f98>: Failed to establish a new connection: [Errno -2] Name or service not known
:
: During handling of the above exception, another exception occurred:
:
: Traceback (most recent call last):
: File “/usr/lib/python3/dist-packages/requests/adapters.py”, line 440, in send
: timeout=timeout
: File “/usr/lib/python3/dist-packages/urllib3/connectionpool.py”, line 639, in urlopen
: _stacktrace=sys.exc_info()[2])
: File “/usr/lib/python3/dist-packages/urllib3/util/retry.py”, line 398, in increment
: raise MaxRetryError(_pool, url, error or ResponseError(cause))
: urllib3.exceptions.MaxRetryError: HTTPSConnectionPool(host=’validate.core-os.net’, port=443): Max retries exceeded with url: /validate (Caused by NewConnectionError(‘<urllib3.connection.VerifiedHTTPSConnection object at 0x7fc6d9c85f98>: Failed to establish a new connection: [Errno -2] Name or service not known’,))
:
: During handling of the above exception, another exception occurred:
:
: Traceback (most recent call last):
: File “/home/derek/.local/lib/python3.6/site-packages/dt_shell/main.py”, line 38, in cli_main
: cli_main_()
: File “/home/derek/.local/lib/python3.6/site-packages/dt_shell/main.py”, line 175, in cli_main_
: shell.onecmd(cmdline)
: File “/usr/lib/python3.6/cmd.py”, line 217, in onecmd
: return func(arg)
: File “/home/derek/.local/lib/python3.6/site-packages/dt_shell/cli.py”, line 287, in <lambda>
: do_command_lam = lambda s, w: do_command(klass, s, w)
: File “/home/derek/.local/lib/python3.6/site-packages/dt_shell/dt_command_abs.py”, line 50, in do_command
: cls.command(shell, args)
: File “/home/derek/.dt-shell/commands-multi/master19/init_sd_card/command.py”, line 245, in command
: step2function[step_name](shell, parsed)
: File “/home/derek/.dt-shell/commands-multi/master19/init_sd_card/command.py”, line 571, in step_setup
: validate_user_data(user_data_yaml)
: File “/home/derek/.dt-shell/commands-multi/master19/init_sd_card/command.py”, line 1083, in validate_user_data
: r = requests.put(url, data=user_data_yaml)
: File “/usr/lib/python3/dist-packages/requests/api.py”, line 126, in put
: return request(‘put’, url, data=data, **kwargs)
: File “/usr/lib/python3/dist-packages/requests/api.py”, line 58, in request
: return session.request(method=method, url=url, **kwargs)
: File “/usr/lib/python3/dist-packages/requests/sessions.py”, line 520, in request
: resp = self.send(prep, **send_kwargs)
: File “/usr/lib/python3/dist-packages/requests/sessions.py”, line 630, in send
: r = adapter.send(request, **kwargs)
: File “/usr/lib/python3/dist-packages/requests/adapters.py”, line 508, in send
: raise ConnectionError(e, request=request)
: requests.exceptions.ConnectionError: HTTPSConnectionPool(host=’validate.core-os.net’, port=443): Max retries exceeded with url: /validate (Caused by NewConnectionError(‘<urllib3.connection.VerifiedHTTPSConnection object at 0x7fc6d9c85f98>: Failed to establish a new connection: [Errno -2] Name or service not known’,))

dts : If you think this is a bug, please report that you are using:
:
: duckietown-challenges: 5.1.5
: duckietown-shell-commands: 4.0.44
: python: “3.6.9 (default, Jul 17 2020, 12:50:27) \n[GCC 8.4.0]”
: duckietown-shell: 5.1.6
: commands-version: master19
: encodings:
: stdout: UTF-8
: stderr: UTF-8
: locale: UTF-8

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