Fatal error: Uncaught Error: Call to undefined function add_action() in C:\xampp\htdocs\WAIT FOR DELETE\wp-content\plugins\jetpack\modules\infinite-scroll\themes\twentyfifteen.php:22 Stack trace: #0 {main} thrown in C:\xampp\htdocs\WAIT FOR DELETE\wp-content\plugins\jetpack\modules\infinite-scroll\themes\twentyfifteen.php on line 22