dataiku api error

Traceback (most recent call last):
File "/usr/lib64/python2.7/runpy.py", line 162, in _run_module_as_main
"__main__", fname, loader, pkg_name)
File "/usr/lib64/python2.7/runpy.py", line 72, in _run_code
exec code in run_globals
File "/installs/dataiku-dss-8.0.0/python/dataiku/apinode/admin/__main__.py", line 56, in <module>
args.func(args, client)
File "/installs/dataiku-dss-8.0.0/python/dataiku/apinode/admin/auth_commands.py", line 6, in admin_key_create
newkey = apiclient.auth().add_key(label=cmdargs.label)
File "/installs/dataiku-dss-8.0.0/python/dataikuapi/apinode_admin/auth.py", line 20, in add_key
return self.client._perform_json("POST", "keys", body=key)
File "/installs/dataiku-dss-8.0.0/python/dataikuapi/base_client.py", line 41, in _perform_json
return self._perform_http(method, path, params, body, False).json()
File "/installs/dataiku-dss-8.0.0/python/dataikuapi/base_client.py", line 27, in _perform_http
auth=auth, stream = stream)
File "/installs/dataiku-dss-8.0.0/python.packages/requests/sessions.py", line 533, in request
resp = self.send(prep, **send_kwargs)
File "/installs/dataiku-dss-8.0.0/python.packages/requests/sessions.py", line 646, in send
r = adapter.send(request, **kwargs)
File "/installs/dataiku-dss-8.0.0/python.packages/requests/adapters.py", line 516, in send
raise ConnectionError(e, request=request)
requests.exceptions.ConnectionError: HTTPConnectionPool(host='127.0.0.1', port=9251): Max retries exceeded with url: /admin/api/keys (Caused by NewConnectionError('<urllib3.connection.HTTPConnection object at 0x7f49f3243890>: Failed to establish a new connection: [Errno 111] Connection refused',))