FB Open Graph Circular Redirect Error Message

I’ve installed the plugin and I am very happy with it. I’d been unable to get my pots to share properly on Facebook until now. However, I am still currently experiencing 2 issues:

When I run my homepage url through the Facebook debugger tool, I receive:

Warnings That Should Be Fixed
Circular Redirect Path
Circular redirect path detected (see ‘Redirect Path’ section for details).
Share App ID Missing
The ‘fb:app_id’ property should be explicitly provided, Specify the app ID so that stories shared to Facebook will be properly attributed to the app. Alternatively, app_id can be set in url when open the share dialog.

And when I run a specific post link url through I receive the same message.

In the preview pane it shows the post title, content snippet, website and author (which is great!) but no image.

How do I fix these issues? Thanks!