Ultimate Facebook, Allowing Permissions

When trying to complete my plugin setup, The Allowing Permissions field is not loading correctly. When I choose the "Refresh user access token" button, I get this message: "Given URL is not allowed by the Application configuration.: One or more of the given URLs is not allowed by the App's settings. It must match the Website URL or Canvas URL, or the domain must be a subdomain of one of the App's domains."

I do not know how to proceed.