Fatal error: Uncaught Error: Call to undefined function add_action() in /home/kacperg/public_html/kacpergr/wp-content/plugins/jetpack/modules/memberships/class-jetpack-memberships.php:140 Stack trace: #0 /home/kacperg/public_html/kacpergr/wp-content/plugins/jetpack/modules/memberships/class-jetpack-memberships.php(110): Jetpack_Memberships->register_init_hook() #1 /home/kacperg/public_html/kacpergr/wp-content/plugins/jetpack/modules/memberships/class-jetpack-memberships.php(496): Jetpack_Memberships::get_instance() #2 {main} thrown in /home/kacperg/public_html/kacpergr/wp-content/plugins/jetpack/modules/memberships/class-jetpack-memberships.php on line 140