Fatal error: Uncaught Error: Call to undefined function Automattic\Jetpack\Extensions\Subscriptions\add_action() in /usr/local/www/wordpress/wp-content/plugins/jetpack/extensions/blocks/subscriptions/subscriptions.php:42 Stack trace: #0 {main} thrown in /usr/local/www/wordpress/wp-content/plugins/jetpack/extensions/blocks/subscriptions/subscriptions.php on line 42