Warning while running an ansible ping against the windows hosts

[Raj]

Hello,

I received an error earlier that my Ansible master unable to connect to windows hosts by throwing below error.

msg": "winrm or requests is not installed: cannot import name UnrewindableBodyError"

by running below command

pip install --proxy=proxyserver:80 --ignore-installed "pywinrm>=0.3.0"

I was able to ping windows servers, however, I am still receiving the below message, which is annoying for huge inventory. 

/usr/lib/python2.7/site-packages/requests_ntlm/requests_ntlm.py:200: NoCertificateRetrievedWarning: Requests is running with a non urllib3 backend, cannot retrieve server certificate for CBT
  NoCertificateRetrievedWarning)
x.x.x.x | SUCCESS => {
    "changed": false,
    "ping": "pong"
}

Can someone check the warning and guide me on how I can address this issue? 

Thanks and Regards

Raj