[facebook] Facebook login "given URL not allowed by application configuration"

I've added facebook login to my site. However, when I click the button, I get a red box that says:

Invalid Argument

Given URL is not allowed by the Application configuration.

If I continue to login then I get:

API Error Code: 100
API Error Description: Invalid parameter
Error Message: next is not owned by the application.

Not sure exactly what the problem is. Any thoughts are appreciated.

I kept getting this error, when using wildcard subdomains with my app. I had the site url set to: http://myapp.com and app domain also to http://myapp.com, and also the same value for the Valid OAuth redirect URIs in the advanced tab of the settings app. I tried different combinations but only setting the http://subdomain.myapp.com as the redirect value worked, of course only for that subdomain.

The solution was to empty the redirect fields, leave it blank, that worked! ;)

According to http://developers.facebook.com/docs/reference/dialogs/oauth/

for me worked

https://apps.facebook.com/YOUR_APP_NAMESPACE (watch fot http:// or https:// issue)

You can set up a developer application and set the url to localhost.com:port Make sure to map localhost.com to localhost on your hosts file

Works for me

Also check to see if you are missing the www in the url which was on my case

i was testing on http://www.mywebsite.com and in the facebook app i had set http://mywebsite.com

I was getting this problem while using a tunnel because I:

1. had the tunnel url:port set in the FB app settings
2. but was accessing the local server by pointing my browser to "http://localhost:3000"

once i started punching the tunnel url:port into the browser, i was good to go.

i'm using Rails and Facebooker, but might help others just the same.