```bash silkaj network Requested default node: <duniter.org:10901> Getting informations about nodes: 0% g1.cgeek.fr 80 3% g1.duniter.org 10901 6% g1.duniter.tednet.fr 8999 9% duniter-g1.vincentux.fr 443 12% jytou.synology.me 9004 Traceback (most recent call last): File "/usr/lib64/python3.5/urllib/request.py", line 1254, in do_open h.request(req.get_method(), req.selector, req.data, headers) File "/usr/lib64/python3.5/http/client.py", line 1107, in request self._send_request(method, url, body, headers) File "/usr/lib64/python3.5/http/client.py", line 1152, in _send_request self.endheaders(body) File "/usr/lib64/python3.5/http/client.py", line 1103, in endheaders self._send_output(message_body) File "/usr/lib64/python3.5/http/client.py", line 934, in _send_output self.send(msg) File "/usr/lib64/python3.5/http/client.py", line 877, in send self.connect() File "/usr/lib64/python3.5/http/client.py", line 1261, in connect server_hostname=server_hostname) File "/usr/lib64/python3.5/ssl.py", line 385, in wrap_socket _context=self) File "/usr/lib64/python3.5/ssl.py", line 760, in __init__ self.do_handshake() File "/usr/lib64/python3.5/ssl.py", line 996, in do_handshake self._sslobj.do_handshake() File "/usr/lib64/python3.5/ssl.py", line 641, in do_handshake self._sslobj.do_handshake() ssl.SSLError: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:720) During handling of the above exception, another exception occurred: Traceback (most recent call last): File "/home/moul/projects/silkaj/silkaj", line 105, in <module> manage_cmd(ep, c) File "/home/moul/projects/silkaj/silkaj", line 80, in manage_cmd network_info(ep, c.contains_switches("discover")) File "/home/moul/projects/silkaj/src/commands.py", line 99, in network_info current_blk = get_current_block(endpoints[i]) File "/home/moul/projects/silkaj/src/tools.py", line 42, in get_current_block return request(ep, "blockchain/current") File "/home/moul/projects/silkaj/src/network_tools.py", line 109, in request response = urllib.request.urlopen(request) File "/usr/lib64/python3.5/urllib/request.py", line 163, in urlopen return opener.open(url, data, timeout) File "/usr/lib64/python3.5/urllib/request.py", line 472, in open response = meth(req, response) File "/usr/lib64/python3.5/urllib/request.py", line 582, in http_response 'http', request, response, code, msg, hdrs) File "/usr/lib64/python3.5/urllib/request.py", line 504, in error result = self._call_chain(*args) File "/usr/lib64/python3.5/urllib/request.py", line 444, in _call_chain result = func(*args) File "/usr/lib64/python3.5/urllib/request.py", line 696, in http_error_302 return self.parent.open(new, timeout=req.timeout) File "/usr/lib64/python3.5/urllib/request.py", line 466, in open response = self._open(req, data) File "/usr/lib64/python3.5/urllib/request.py", line 484, in _open '_open', req) File "/usr/lib64/python3.5/urllib/request.py", line 444, in _call_chain result = func(*args) File "/usr/lib64/python3.5/urllib/request.py", line 1297, in https_open context=self._context, check_hostname=self._check_hostname) File "/usr/lib64/python3.5/urllib/request.py", line 1256, in do_open raise URLError(err) urllib.error.URLError: <urlopen error [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:720)> ```