Fatal error: Uncaught Error: Call to undefined function add_action() in /home/mdbmef/public_html/wp-content/plugins/elementskit/widgets/mail-chimp/classes/mail-chimp-rest.php:62 Stack trace: #0 {main} thrown in /home/mdbmef/public_html/wp-content/plugins/elementskit/widgets/mail-chimp/classes/mail-chimp-rest.php on line 62