r = requests.get('https://portal.rosreestr.ru:4433/cxf/External?wsdl', cert='/etc/ssl/certs/portal.rosreestr.ru.pem', verify=True)

 Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/urllib3/connectionpool.py", line 560, in urlopen
    body=body, headers=headers)
  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 787, in _validate_conn
    conn.connect()
  File "/usr/lib/python3/dist-packages/urllib3/connection.py", line 252, in connect
    ssl_version=resolved_ssl_version)
  File "/usr/lib/python3/dist-packages/urllib3/util/ssl_.py", line 303, in ssl_wrap_socket
    context.load_cert_chain(certfile, keyfile)
ssl.SSLError: [SSL] PEM lib (_ssl.c:2844)
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/requests/adapters.py", line 376, in send
    timeout=timeout
  File "/usr/lib/python3/dist-packages/urllib3/connectionpool.py", line 589, in urlopen
    raise SSLError(e)
requests.packages.urllib3.exceptions.SSLError: [SSL] PEM lib (_ssl.c:2844)
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
  File "rosreestr_requests.py", line 48, in <module>
    r = requests.get('https://portal.rosreestr.ru:4433/cxf/External?wsdl', cert='/etc/ssl/certs/portal.rosreestr.ru.pem', verify=True)
  File "/usr/lib/python3/dist-packages/requests/api.py", line 67, in get
    return request('get', url, params=params, **kwargs)
  File "/usr/lib/python3/dist-packages/requests/api.py", line 53, in request
    return session.request(method=method, url=url, **kwargs)
  File "/usr/lib/python3/dist-packages/requests/sessions.py", line 468, in request
    resp = self.send(prep, **send_kwargs)
  File "/usr/lib/python3/dist-packages/requests/sessions.py", line 576, in send
    r = adapter.send(request, **kwargs)
  File "/usr/lib/python3/dist-packages/requests/adapters.py", line 447, in send
    raise SSLError(e, request=request)
requests.exceptions.SSLError: [SSL] PEM lib (_ssl.c:2844)

 context.load_cert_chain(certfile, keyfile)
ssl.SSLError: [SSL] PEM lib (_ssl.c:2844)

 cert = ("/opt/gost-ssl/ssl/certs/certfile.pem", "/opt/gost-ssl/ssl/certs/nopasskey.pem")
r = requests.get('https://portal.rosreestr.ru:4433/cxf/External?wsdl', cert=cert, verify=True)
ругается на
requests.exceptions.SSLError: [SSL: X509_LIB] x509 lib (_ssl.c:2825)