App Deployment on Google App Engine Path to Certificate Not Provided Error

For the past few days, I have been trying to trace the source of the error shown in the block while trying to deploy an application to google engine on a windows machine using the command:

> gcloud preview app deploy app.yaml

      

        
        
        
      

    

Starting deployment ... Verifying that the managed virtual machines are powered on and ready.

Traceback (last call last): ...

File "C: \ Program Files \ Google \ Cloud SDK \ google-cloud-sdk \ bin ... / lib \ docker \ docker \ tls.py", line 46, in INIT

'You must specify the path to the certificate and key files

TLSParameterError: The path to the certificate and key files must be provided via the client_config parameter. TLS configurations must match Docker CLI client configurations.

Does anyone know how to fix this problem?

FYI: I have set environment variables DOCKER_CERT_PATH

, DOCKER_TLS_VERIFY

and DOCKER_HOST

how to set Docker.