HTTPS (Kube-lego) fails to recieve certificate

JupyterHub
1

Hi

I have successfully sat up the cluster on bare metal. I can access jhub and login via Oauth. I can start/stop notebooks. The domain is registered and accessible via DNS.

Everything is working fine. Only the problem I am having is with kubelego : it is not getting new certificates - all i am getting is following messages from kubelego container:

time=“2019-02-25T06:13:28Z” level=warning msg=“authorization failed after 5m0s: reachability test failed: wrong status code ‘404’” context=acme domain=<my.jhub.domain>
time=“2019-02-25T06:13:28Z” level=error msg=“Error while processing certificate requests: no domain could be authorized successfully” context=kubelego
time=“2019-02-25T06:13:28Z” level=error msg=“worker: error processing item, requeuing after rate limit: no domain could be authorized successfully” context=kubelego

My configuration look like below:

proxy:
  secretToken: "xxxxxxxxxxxxxxxxxxxxxxxxxxx"
  service:
    type: NodePort
    nodePorts:
      http: 30080
      https: 30443
  https:
    hosts:
     - my.jhub.domain
    enabled: true
    type: letsencrypt
    letsencrypt:
      contactEmail: 'test@domain.us'
  lego:
    image:
      name: jetstack/kube-lego
      tag: 0.1.6
      pullPolicy: IfNotPresent

Thanks in advance !!