Error in request, cache key

[a21250450]

Error:
Traceback (most recent call last):
  File "/root/DNSaaS.py", line 497, in requestToken
    response, content = h.request(target.geturl(), 'POST', json.dumps(msgJson), headers)
  File "/usr/local/lib/python2.7/dist-packages/httplib2/__init__.py", line 2135, in request
    cachekey,
  File "/usr/local/lib/python2.7/dist-packages/httplib2/__init__.py", line 1796, in _request
    conn, request_uri, method, body, headers
  File "/usr/local/lib/python2.7/dist-packages/httplib2/__init__.py", line 1737, in _conn_request
    response = conn.getresponse()
  File "/usr/lib/python2.7/httplib.py", line 1108, in getresponse
    raise ResponseNotReady()
ResponseNotReady

Hello, someone can help me with these errors, I'm trying to make the orders with the postman?

Thanks