facebook link not always connecting

My social icons are at the bottom of my emails and they are all connected, however, the facebook icon does not always work. When the email is sent and the facebook icon is clicked, facebook comes up, but this message is delivered: "This content isn't available right now." What could be the issue here? Our FB account is public, and the link works when pasting it directly into the browser, just not always when clicking the icon on the e-mail. Thank you for any guidance!