Please go to your WordPress Dashboard – Facebook Feed – Customize – Misc (tabbed page) – within the first section on the page for options make sure the “Yes” box is checked after the setting “Show the Like Box”
In the next option indicate (using the dropdown selector) as to whether or not you want to view this element at the top of your feed display or the bottom.
Then move down 3 more option settings and place a check mark in the “Yes” box after the “Include the Cover Photo” option.
Click on Save Changes on the page. The Like Box contains and displays your Facebook account’s cover photo in an iframe element that is provided directly from Facebook.