robotframework-requests: AttributeError: 'unicode' object has no attribute 'items' Windows incompatbility

There seems to be an incompatibility between the Create Session keyword and later being used by the Get Request keyword when run on a windows environment. Below is the test case:

Setup Suite Create Session mysession ${BASE_URL}

Test Member Endpoint Default Functionality [Documentation] Tests the /api/member servlet to check service status
Verify MSV Inserter Member Servlet In Normal Mode

Verify Member Servlet in Normal Mode [Documentation] Calls the /api/member servlet to check for a 200 status and status:up [Arguments] ${alias} ${resp}= Get Request ${alias} ${MEMBER_PATH} timeout=5 Should be Equal As Numbers ${resp.status_code} 200 [return] ${resp}

Linux results:

==============================================================================
20170303 09:40:10.733 - INFO - +--- START SETUP: BuiltIn.Run Keywords [ Setup Suite ]
20170303 09:40:10.733 - INFO - +---- START KW: Setup Suite [ ]
20170303 09:40:10.734 - INFO - +----- START KW: RequestsLibrary.Create Session [ mysession | ${BASE_URL} ]
20170303 09:40:10.734 - INFO - Creating Session using : alias=mysession, url=http://192.168.215.148:8180/, headers={},                     cookies=None, auth=None, timeout=None, proxies=None, verify=False,                     debug=0
20170303 09:40:10.735 - DEBUG - Creating session: mysession
20170303 09:40:10.735 - DEBUG - Argument types are:
<type 'bool'>
20170303 09:40:10.735 - INFO - +----- END KW: RequestsLibrary.Create Session (1)
20170303 09:40:10.736 - INFO - +----- START KW: BuiltIn.Log [ Setup Suite | DEBUG ]
20170303 09:40:10.736 - DEBUG - Setup Suite
20170303 09:40:10.736 - INFO - +----- END KW: BuiltIn.Log (0)
20170303 09:40:10.736 - INFO - +---- END KW: Setup Suite (3)
20170303 09:40:10.737 - INFO - +--- END SETUP: BuiltIn.Run Keywords (4)
------------------------------------------------------------------------------
20170303 09:40:10.737 - INFO - +--- START TEST: Test Member Endpoint Default Functionality [ ]
------------------------------------------------------------------------------
20170303 09:40:10.738 - INFO - +---- START KW: Verify Member Servlet In Normal Mode [ ]
20170303 09:40:10.739 - INFO - +----- START KW: resource_member_servlet.Verify Member Servlet in Normal Mode [ mysession ]
20170303 09:40:10.740 - INFO - +------ START KW: RequestsLibrary.Get Request [ ${alias} | ${MEMBER_PATH} | timeout=5 ]
20170303 09:40:10.764 - INFO - Get Request using : alias=mysession, uri=/api/member, headers=None
20170303 09:40:10.767 - INFO - ${resp} = <Response [200]>
20170303 09:40:10.767 - INFO - +------ END KW: RequestsLibrary.Get Request (27)
20170303 09:40:10.767 - INFO - +------ START KW: BuiltIn.Should Be Equal As Numbers [ ${resp.status_code} | 200 ]
20170303 09:40:10.768 - INFO - Argument types are:
<type 'int'>
<type 'unicode'>
20170303 09:40:10.768 - INFO - +------ END KW: BuiltIn.Should Be Equal As Numbers (1)

Windows Result

==============================================================================
20170303 09:39:54.244 - INFO - +--- START SETUP: BuiltIn.Run Keywords [ Setup Suite ]
20170303 09:39:54.245 - INFO - +---- START KW: Setup Suite [ ]
20170303 09:39:54.246 - INFO - +----- START KW: RequestsLibrary.Create Session [ mysession | ${BASE_URL} ]
20170303 09:39:54.246 - INFO - Creating Session using : alias=mysession, url=http://192.168.215.148:8180/, headers={}, cookies=None, auth=None, timeout=None, proxies=None, verify=False
20170303 09:39:54.246 - DEBUG - Creating session: mysession
20170303 09:39:54.247 - DEBUG - Argument types are:
<type 'bool'>
20170303 09:39:54.247 - INFO - +----- END KW: RequestsLibrary.Create Session (1)
20170303 09:39:54.247 - INFO - +----- START KW: BuiltIn.Log [ Setup Suite | DEBUG ]
20170303 09:39:54.248 - DEBUG - Setup Suite
20170303 09:39:54.248 - INFO - +----- END KW: BuiltIn.Log (1)
20170303 09:39:54.248 - INFO - +---- END KW: Setup Suite (3)
20170303 09:39:54.248 - INFO - +--- END SETUP: BuiltIn.Run Keywords (4)
------------------------------------------------------------------------------
20170303 09:39:54.249 - INFO - +--- START TEST: Test Member Endpoint Default Functionality [ ]
------------------------------------------------------------------------------
20170303 09:39:54.251 - INFO - +---- START KW: Verify Member Servlet In Normal Mode [ ]
20170303 09:39:54.252 - INFO - +----- START KW: resource_member_servlet.Verify Member Servlet in Normal Mode [ mysession ]
20170303 09:39:54.253 - INFO - +------ START KW: RequestsLibrary.Get Request [ ${alias} | ${MEMBER_PATH} | timeout=5 ]
20170303 09:39:54.258 - FAIL - AttributeError: 'unicode' object has no attribute 'items'
20170303 09:39:54.258 - DEBUG - Traceback (most recent call last):
  File "C:\Python27\Lib\site-packages\RequestsLibrary\RequestsKeywords.py", line 172, in get_request
    response = self._get_request(session, uri, headers, params, redir)
  File "C:\Python27\Lib\site-packages\RequestsLibrary\RequestsKeywords.py", line 473, in _get_request
    allow_redirects=allow_redirects)
  File "C:\Python27\Lib\site-packages\requests\sessions.py", line 487, in get
    return self.request('GET', url, **kwargs)
  File "C:\Python27\Lib\site-packages\requests\sessions.py", line 461, in request
    prep = self.prepare_request(req)
  File "C:\Python27\Lib\site-packages\requests\sessions.py", line 394, in prepare_request
    hooks=merge_hooks(request.hooks, self.hooks),
  File "C:\Python27\Lib\site-packages\requests\models.py", line 296, in prepare
    self.prepare_headers(headers)
  File "C:\Python27\Lib\site-packages\requests\models.py", line 407, in prepare_headers
    self.headers = CaseInsensitiveDict((to_native_string(name), value) for name, value in headers.items())
20170303 09:39:54.258 - INFO - +------ END KW: RequestsLibrary.Get Request (5)
20170303 09:39:54.258 - INFO - +----- END KW: resource_member_servlet.Verify Member Servlet in Normal Mode (6)