Fatal error: Uncaught Error: Call to undefined function add_shortcode() in /home1/fghp23/public_html/wp-content/plugins/jetpack/modules/shortcodes/tweet.php:19 Stack trace: #0 {main} thrown in /home1/fghp23/public_html/wp-content/plugins/jetpack/modules/shortcodes/tweet.php on line 19