Attention Blogger!

Given URL is not allowed by the Application configuration.: One or more of the given URLs is not allowed by the Application configuration. It must match one of the Connect or Canvas URLs or domain must be the same as or a subdomain of one of the Application's base domains. This is showing up on top of my posts. I don't know what it means. I don't know how to get rid of it. And I don't know how to get your attention.