Error #1 I receive the following error msg, when I hit

Hi

Error #1
I receive the following error msg, when I hit the facebook login on the login page.
User registration is currently not allowed.

Note : Guest registration is enabled.

Error #2 - this error message is displayed when the facebook connect widget on the home page is clicked.

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.

Can u kindly help please ?

PS Support is enabled