Fatal error: Uncaught Error: Call to undefined function add_action() in /opt/app-root/src/wp-content/plugins/jetpack/modules/infinite-scroll.php:54 Stack trace: #0 /opt/app-root/src/wp-content/plugins/jetpack/modules/infinite-scroll.php(42): Jetpack_Infinite_Scroll_Extras->__construct() #1 /opt/app-root/src/wp-content/plugins/jetpack/modules/infinite-scroll.php(234): Jetpack_Infinite_Scroll_Extras::instance() #2 {main} thrown in /opt/app-root/src/wp-content/plugins/jetpack/modules/infinite-scroll.php on line 54