Fatal error: Uncaught Error: Call to undefined function add_action() in /home/artemi19/public_html/test/wp-content/plugins/jetpack/modules/widget-visibility/widget-conditions.php:628 Stack trace: #0 /home/artemi19/public_html/test/wp-content/plugins/jetpack/modules/widget-visibility.php(13): include() #1 {main} thrown in /home/artemi19/public_html/test/wp-content/plugins/jetpack/modules/widget-visibility/widget-conditions.php on line 628