MissingSchema: Invalid URL 'None': No schema supplied. Perhaps you meant http://None?

installed the eikon package, created an app id, but get the following errors when querying:

In [1]: import eikon as ek

In [2]: ek.set_app_id('xxxxxxxxx')

No handlers could be
found for logger "pyeikon"

In [3]: ek.set_app_id('xxxxxxxxx')

In [4]: ek.get_news_headlines('R:LHAG.DE',
date_from='2017-04-05T09:00:00', date_to='2017-04-05T18:00:00')

---------------------------------------------------------------------------

MissingSchema
Traceback (most recent call last)

<ipython-input-4-498a2e2a3dbc> in <module>()

----> 1 ek.get_news_headlines('R:LHAG.DE',
date_from='2017-04-05T09:00:00', date_to='2017-04-05T18:00:00')

/home/wqmo/packages/anaconda2/lib/python2.7/site-packages/eikon/news_request.pyc
in get_news_headlines(query, count, date_from, date_to, raw_output, debug)

104 payload.update({'dateTo':
to_datetime(date_to).isoformat()})

105

--> 106 result =
eikon.json_requests.send_json_request(News_Headlines_UDF_endpoint, payload,
debug=debug)

107

108 if raw_output:

/home/wqmo/packages/anaconda2/lib/python2.7/site-packages/eikon/json_requests.pyc
in send_json_request(entity, payload, ID, debug)

75
headers={'Content-Type':
'application/json',

76
'x-tr-applicationid': profile.get_application_id()},

--->
77
timeout=60)

78

79 if
debug:

/home/wqmo/packages/anaconda2/lib/python2.7/site-packages/requests/sessions.pyc
in post(self, url, data, json, **kwargs)

563 """

564

--> 565
return self.request('POST', url, data=data, json=json, **kwargs)

566

567 def put(self,
url, data=None, **kwargs):

/home/wqmo/packages/anaconda2/lib/python2.7/site-packages/requests/sessions.pyc
in request(self, method, url, params, data, headers, cookies, files, auth,
timeout, allow_redirects, proxies, hooks, stream, verify, cert, json)

502
hooks = hooks,

503 )

--> 504 prep
= self.prepare_request(req)

505

506 proxies = proxies or {}

/home/wqmo/packages/anaconda2/lib/python2.7/site-packages/requests/sessions.pyc
in prepare_request(self, request)

434
auth=merge_setting(auth, self.auth),

435
cookies=merged_cookies,

-->
436
hooks=merge_hooks(request.hooks, self.hooks),

437 )

438 return p

/home/wqmo/packages/anaconda2/lib/python2.7/site-packages/requests/models.pyc
in prepare(self, method, url, headers, files, data, params, auth, cookies,
hooks, json)

300

301 self.prepare_method(method)

--> 302
self.prepare_url(url, params)

303
self.prepare_headers(headers)

304
self.prepare_cookies(cookies)

/home/wqmo/packages/anaconda2/lib/python2.7/site-packages/requests/models.pyc
in prepare_url(self, url, params)

380
error = error.format(to_native_string(url, 'utf8'))

381

-->
382
raise MissingSchema(error)

383

384
if not host:

MissingSchema: Invalid
URL 'None': No schema supplied. Perhaps you meant http://None?

How can I fix this ?

Thanks