Fatal error: Uncaught Error: Call to undefined function add_action() in /nfs/aesop1/hw00/d96/knoxm/wordpress/wp-content/plugins/rsvp-me/admin.php:8 Stack trace: #0 {main} thrown in /nfs/aesop1/hw00/d96/knoxm/wordpress/wp-content/plugins/rsvp-me/admin.php on line 8