Fatal error: Uncaught Error: Call to undefined function add_action() in /var/www/Nielsen/public_html/wp-content/plugins/jetpack/modules/memberships/class-jetpack-memberships.php:212 Stack trace: #0 /var/www/Nielsen/public_html/wp-content/plugins/jetpack/modules/memberships/class-jetpack-memberships.php(166): Jetpack_Memberships->register_init_hook() #1 /var/www/Nielsen/public_html/wp-content/plugins/jetpack/modules/memberships/class-jetpack-memberships.php(918): Jetpack_Memberships::get_instance() #2 {main} thrown in /var/www/Nielsen/public_html/wp-content/plugins/jetpack/modules/memberships/class-jetpack-memberships.php on line 212