Facebook integration error 191 - how to fix

I have created a Facebook application and am using the API details to get the application integrated with Facebook. However, I get the following error when I click on Login:

API E开发者_如何学编程rror Code: 191 API Error Description: The specified URL is not owned by the application Error Message: redirect_uri is not owned by the application.

Why am I getting this error and how can I correct it?

there is a setting in your application settings under the "web site" tab that says: "website URL". There must be a match between this an your redirect_uri (at least at the domain-level).