Fatal error: Uncaught Error: Call to undefined function add_action() in /opt/app-root/src/wp-content/plugins/jetpack/modules/wordads/php/class-wordads-cron.php:21 Stack trace: #0 /opt/app-root/src/wp-content/plugins/jetpack/modules/wordads/php/class-wordads-cron.php(53): WordAds_Cron->__construct() #1 {main} thrown in /opt/app-root/src/wp-content/plugins/jetpack/modules/wordads/php/class-wordads-cron.php on line 21