PyKMIP: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:852)

I’m trying to use this library for communication with Equinix SmartKey via KMIP interface (which they say is supported). I have this “certificate verify failed” exception but not sure what’s failing on my end. I did a self signed certificate and also tried to download the server’s certificate for the “ca_certs”. This is my configuration:

[client]
host=eu.smartkey.io
port=5696
certfile=/mnt/homes/oded/tmpProj/pykmip/example-com.cert.pem
keyfile=/mnt/homes/oded/tmpProj/pykmip/example-com.key.pem
ca_certs=/mnt/homes/oded/tmpProj/pykmip/smartkeycert.cer
cert_reqs=CERT_REQUIRED
ssl_version=PROTOCOL_TLS
do_handshake_on_connect=True
suppress_ragged_eofs=True
username=*** (email of smartkey user)
password=***  (password of  smartkey user)

I run the example in kmip/demos/pie/get.py and get this:

Traceback (most recent call last):
  File "get.py", line 48, in <module>
    config_file=config_file
  File "/usr/local/lib/python3.6/dist-packages/kmip/pie/client.py", line 1745, in __enter__
    self.open()
  File "/usr/local/lib/python3.6/dist-packages/kmip/pie/client.py", line 173, in open
    self.proxy.open()
  File "/usr/local/lib/python3.6/dist-packages/kmip/services/kmip_client.py", line 275, in open
    self.socket.connect((self.host, self.port))
  File "/usr/lib/python3/dist-packages/six.py", line 693, in reraise
    raise value
  File "/usr/local/lib/python3.6/dist-packages/kmip/services/kmip_client.py", line 275, in open
    self.socket.connect((self.host, self.port))
  File "/usr/lib/python3.6/ssl.py", line 1109, in connect
    self._real_connect(addr, False)
  File "/usr/lib/python3.6/ssl.py", line 1100, in _real_connect
    self.do_handshake()
  File "/usr/lib/python3.6/ssl.py", line 1077, in do_handshake
    self._sslobj.do_handshake()
  File "/usr/lib/python3.6/ssl.py", line 689, in do_handshake
    self._sslobj.do_handshake()
ssl.SSLError: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:852)