Fatal error: Uncaught Error: Call to undefined function add_action() in /home/m5dergi/public_html/wp-content/plugins/onesignal-free-web-push-notifications/v2/configuration-export.php:58 Stack trace: #0 {main} thrown in /home/m5dergi/public_html/wp-content/plugins/onesignal-free-web-push-notifications/v2/configuration-export.php on line 58