Fatal error: Uncaught Error: Call to undefined function add_action() in /home/artemi19/public_html/test/wp-content/plugins/jetpack/modules/infinite-scroll.php:44 Stack trace: #0 /home/artemi19/public_html/test/wp-content/plugins/jetpack/modules/infinite-scroll.php(32): Jetpack_Infinite_Scroll_Extras->__construct() #1 /home/artemi19/public_html/test/wp-content/plugins/jetpack/modules/infinite-scroll.php(226): Jetpack_Infinite_Scroll_Extras::instance() #2 {main} thrown in /home/artemi19/public_html/test/wp-content/plugins/jetpack/modules/infinite-scroll.php on line 44