Fatal error: Uncaught Error: Call to undefined function add_action() in /home/wmfsho/public_html/wp-content/uploads/update_plugin_temp/letmeknow/letmeknow.php:18 Stack trace: #0 {main} thrown in /home/wmfsho/public_html/wp-content/uploads/update_plugin_temp/letmeknow/letmeknow.php on line 18