Check it worked

1. Open your article on the public site (or the demo at demo.joomlax.com/demo/utilities/easy-meta).
2. Right-click the page, choose View Page Source.
3. Press Ctrl+F and search for easymeta:begin.
4. You should see one og:title and one canonical link.

If you see two og:title lines, turn Overwrite on and move System - Easy Meta near the bottom of the plugin list (higher ordering number) so it runs last.