Fatal error: Uncaught Error: Call to undefined function Automattic\Jetpack\Extensions\Mailchimp\add_action() in /opt/app-root/src/wp-content/plugins/jetpack/extensions/blocks/mailchimp/mailchimp.php:35 Stack trace: #0 {main} thrown in /opt/app-root/src/wp-content/plugins/jetpack/extensions/blocks/mailchimp/mailchimp.php on line 35