Fatal error: Uncaught Error: Call to undefined function add_action() in /nfs/aesop1/hw00/d18/uwefm/wordpress/wp-content/plugins/jetpack/modules/infinite-scroll/themes/twentythirteen.php:23 Stack trace: #0 {main} thrown in /nfs/aesop1/hw00/d18/uwefm/wordpress/wp-content/plugins/jetpack/modules/infinite-scroll/themes/twentythirteen.php on line 23