Subscription dosen't work in local cluster



====Local Cluster

  1. I have deployed a service on local cluster
  2. opened the simple URL in the browser
  3. created a subscription payload
  4. clicked on play button and i get error “undefined is not an object (evaluating ‘r.subscribe’)”

====Graphcool cloud
I deploy the same service on graphcool cloud and the subscription works fine and i get the notifications

Please let me know do i need to anything specific on local cluster or am i missing anything