Tfv8 reads but won’t fire

This after I fixed it on my own in this other discussion…

New Problem. The black tank was working fine on the Bec pro until I woke up this morning. Now it won't fire. No error msgs. It's reading the Atty at 1.7 but it won't heat it…and it was working perfectly fine all of yesterday.

Fatal error: Uncaught Exception: 12: REST API is deprecated for versions v2.1 and higher (12) thrown in /home/vapincap/public_html/wp-content/plugins/seo-facebook-comments/facebook/base_facebook.php on line 1273