Error when setting the Pusher cluster to 'eu'

Question

I'm using the Pusher Javascript library to create a realtime webapp. Everything works like a charm, however when I set the cluster parameter to eu (my users will be connecting from France only), I get an error.

This is the code I use:

var pusher = new Pusher('<thisismykey>', {
  encrypted: true,
  authEndpoint: '{{ baseUrl() }}/pusher_auth',
  cluster: 'eu' // This
});

And this is the error I get:

{
  "type": "WebSocketError",
  "error": {
    "type": "PusherError",
    "data": {
      "code": 4001,
      "message": "Could not find app by key <thisismykey>. Perhaps you're connecting to the wrong cluster."
    }
  }
}

Am I allowed to use this parameter? Or is there a thing to do in my Pusher dashboard? The Pusher docs are not quite clear about this.

Answer 1

Quoting @dan_waterworth's comment :

A Pusher app exists in a particular cluster. If you get in touch with support, they'll be able to get you an app in the EU cluster.

Answer 2

The accepted answer doesn't help much IMHO.

In my case, I got confused between PUSHER_KEY and PUSHER_APP_ID .

Hence my code is (in .erb ):

  pusher = new Pusher('<%=ENV['PUSHER_KEY']%>',
    cluster: 'eu',
    encrypted: true,
    authEndpoint: '/notifications/auth'
  )