Fatal error: Uncaught Error: Call to undefined function add_action() in /usr/www/users/dalc/wp-content/plugins/jetpack/modules/infinite-scroll/themes/twentythirteen.php:23 Stack trace: #0 {main} thrown in /usr/www/users/dalc/wp-content/plugins/jetpack/modules/infinite-scroll/themes/twentythirteen.php on line 23