Facebook Authentication using oAuth


Could anyone help with this? I’m using Passport oath for facebook authentication.
I think it is related to the cloud9 environment.
I have tried everything to get around this error:

Can’t Load URL: The domain of this URL isn’t included in the app’s domains. To be able to load this URL, add all domains and subdomains of your app to the App Domains field in your app settings._
My site URL: https://passport-oauth-martinmars.c9users.io/
My App Domains: passport-oauth-martinmars.c9users.io