This has just started. If I am signed into Facebook and try and reach this URL (WFC Forums) I get the following 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. I can either sign out of Facebook or access this site in incognito mode - I am using Chrome. Any ideas ??