Fatal error: Uncaught Error: Call to undefined function add_action() in /home/cleangre/public_html/wp-content/plugins/jetpack/jetpack_vendor/automattic/jetpack-classic-theme-helper/src/responsive-videos.php:39 Stack trace: #0 {main} thrown in /home/cleangre/public_html/wp-content/plugins/jetpack/jetpack_vendor/automattic/jetpack-classic-theme-helper/src/responsive-videos.php on line 39