Access Control Allow Origin is no present on signalr 2.0 cross domain cors

I have a Asp.Net Signalr application hosted on mokey.gear.host, and an emberjs app hosted on frozen-brook-1900.herokuapp.com.

Everything works fine locally, and I can communicate my client app to signalr. I can access mokey.gear.host deployed app through my local client application. But when I deploy client to heroku it gives me this error:

XMLHttpRequest cannot load http://ift.tt/1HzOB1Q. 
No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://ift.tt/1LlvRRB' is therefore not allowed access.

This is my server configuration:

app.Map("/signalr", map =>
{

    var corsPolicy = new CorsPolicy
    {
        AllowAnyHeader = true,
        AllowAnyMethod = true
    };
    corsPolicy.Origins.Add("http://ift.tt/1HzOB1T");
    corsPolicy.Origins.Add("http://ift.tt/1LlvTZx");
    map.UseCors(new CorsOptions
    {
        PolicyProvider = new CorsPolicyProvider {
            PolicyResolver =
            r => Task.FromResult(corsPolicy)
        }
    });

    map.RunSignalR(config);
});

This is my client configuration:

index.html

<!--<script src="http://localhost:51614/signalr/hubs"></script>-->
<script src="http://ift.tt/1LlvTZz"></script>

hubs.js

// $.connection.hub.url = 'http://localhost:51614/signalr';
$.connection.hub.url = 'http://ift.tt/1LlvTZD';

$.connection.hub.start({
  withCredentials: false
}).then(function() {
  console.log('connected');
  self.lobby.server.join();
});

You can visit my client app and see the error for yourself at: http://ift.tt/1HzOC5M