xcenter deployment failed

When xenv checks for new deployments we are getting below error in deployment.log

the xcenter certificate is self-signed and trusted.ca-bundle (renamed xcenter cert) is placed in C:/environment/ssl/

CN value return by xcenter and the value that xenv checks are exactly same.

xstore version 7.1.0

[INFO    ] [DeploymentMgr       ] [2017-05-05 03:54:52,747] Checking for new deployments...

[INFO    ] [DeploymentMgr       ] [2017-05-05 03:54:52,747] URL: https://xxxxx:8443/xcenter/update/GetUpdates

[DEBUG   ] [DeploymentMgr       ] [2017-05-05 03:54:52,747] Parameters: {'BUSINESS_DATE': '1493970892748', 'ORG_ID': '1000', 'RETAIL_LOC_ID': '999'}

[DEBUG   ] [DeploymentMgr       ] [2017-05-05 03:54:52,747] Trusted CA Bundle: C:/environment/ssl/trusted.ca-bundle

[INFO    ] [DeploymentMgr       ] [2017-05-05 03:54:52,747] SSL Error: [Errno 1] _ssl.c:510: error:14090086:SSL routines:SSL3_GET_SERVER_CERTIFICATE:certificate verify failed