error zeep dian client

  response = client.service.GetStatusZip(trackId="1f62319f-db19-4f7a-8578-xxxxx")
  File "/home/ubuntu/.local/lib/python3.6/site-packages/zeep/proxy.py", line 45, in __call__
    kwargs,
  File "/home/ubuntu/.local/lib/python3.6/site-packages/zeep/wsdl/bindings/soap.py", line 130, in send
    return self.process_reply(client, operation_obj, response)
  File "/home/ubuntu/.local/lib/python3.6/site-packages/zeep/wsdl/bindings/soap.py", line 185, in process_reply
    client.wsse.verify(doc)
  File "/home/ubuntu/.local/lib/python3.6/site-packages/zeep/wsse/signature.py", line 73, in verify
    _verify_envelope_with_key(envelope, key)
  File "/home/ubuntu/.local/lib/python3.6/site-packages/zeep/wsse/signature.py", line 313, in _verify_envelope_with_key
    signature = security.find(QName(ns.DS, "Signature"))
AttributeError: 'NoneType' object has no attribute 'find'
ubuntu@ip-10-0-0-192:/tmp/dian$ File "/home/ubuntu/.local/lib/python3.6/site-packages/zeep/proxy.py", line 45, in __call__
    return self.process_reply(client, operation_obj, response)
  File "/home/ubuntu/.local/lib/python3.6/site-packages/zeep/wsdl/bindings/soap.py", line 185, in process_reply
    client.wsse.verify(doc)
  File "/home/ubuntu/.local/lib/python3.6/site-packages/zeep/wsse/signature.py", line 73, in verify
    _verify_envelope_with_key(envelope, key)
  File "/home/ubuntu/.local/lib/python3.6/site-packages/zeep/wsse/signature.py", line 313, in _verify_envelope_with_key
    signature = security.find(QName(ns.DS, "Signature"))
AttributeError: 'NoneType' object has no attribute 'find'