Can't Load URL: The domain of this URL isn't included in the app's domains. To be able to load this URL... Codeigniter
It was confirmed on Facebook’s bug platform that they had made some changes to the the default settings for new Apps and now Strict Mode is automatically enabled for the oAuth settings.Strict mode means that when using Facebook login to connect your application or website to the App, the oAuth redirect URL has to be explicitly set, where as before it didn’t.
So, here is the step to fix it:
Go to http://developers.facebook.com/apps/ and select the app youwish to fix.
At the bottom of the left hand menu click + Add Product link.
Select Facebook Login as the Product.
Select Web.
Enter your Site URL and hit save.
Hit Continue then keep clicking Next, ignoring all the code, untilyou get to Step 5.
In the left hand menu you should now see Facebook Login, click theSettings menu item underneath it.
Under Client oAuth settings, where it says Use Strict Mode forRedirect URIs make sure it’s set to No and that your site URL is inthe Valid OAuth redirect URIs box. Then the hit save.
You should now be able to connect your app as normal.
Hope it will fix your problem.