When Add New Post

#0 /home/nuwagi/public_html/wp-content/plugins/fb-instant-articles/vendor/facebook/graph-sdk/src/Facebook/FacebookResponse.php(210): Facebook\Exceptions\FacebookResponseException::create(Object(Facebook\FacebookResponse))
#1 /home/nuwagi/public_html/wp-content/plugins/fb-instant-articles/vendor/facebook/graph-sdk/src/Facebook/FacebookResponse.php(255): Facebook\FacebookResponse->makeException()
#2 /home/nuwagi/public_html/wp-content/plugins/fb-instant-articles/vendor/facebook/graph-sdk/src/Facebook/FacebookResponse.php(82): Facebook\FacebookResponse->decodeBody()
#3 /home/nuwagi/public_html/wp-content/plugins/fb-instant-articles/vendor/facebook/graph-sdk/src/Facebook/FacebookClient.php(224): Facebook\FacebookResponse->__construct(Object(Facebook\FacebookRequest), ‘{“error”:{“mess…’, 400, Array)
#4 /home/nuwagi/public_html/wp-content/plugins/fb-instant-articles/vendor/facebook/graph-sdk/src/Facebook/Facebook.php(469): Facebook\FacebookClient->sendRequest(Object(Facebook\FacebookRequest))
#5 /home/nuwagi/public_html/wp-content/plugins/fb-instant-articles/vendor/facebook/graph-sdk/src/Facebook/Facebook.php(366): Facebook\Facebook->sendRequest(‘POST’, ‘/?id=http%3A%2F…’, Array, ’98a8a01839f722e…’, NULL, ‘v2.10’)
#6 /home/nuwagi/public_html/wp-content/plugins/fb-instant-articles/facebook-instant-articles.php(518): Facebook\Facebook->post(‘/?id=http%3A%2F…’, Array, ’98a8a01839f722e…’)
#7 /home/nuwagi/public_html/wp-includes/class-wp-hook.php(286): invalidate_scrape_on_update(3904, Object(WP_Post), Object(WP_Post))
#8 /home/nuwagi/public_html/wp-includes/class-wp-hook.php(310): WP_Hook->apply_filters(3905, Array)
#9 /home/nuwagi/public_html/wp-includes/plugin.php(453): WP_Hook->do_action(Array)
#10 /home/nuwagi/public_html/wp-includes/post.php(3647): do_action(‘post_updated’, 3904, Object(WP_Post), Object(WP_Post))
#11 /home/nuwagi/public_html/wp-includes/post.php(3746): wp_insert_post(Array, false)
#12 /home/nuwagi/public_html/wp-admin/includes/post.php(399): wp_update_post(Array)
#13 /home/nuwagi/public_html/wp-admin/post.php(200): edit_post()
#14 {main}