Notice: Undefined variable: db in /var/www/html/usersc/plugins/alerts/footer.php on line 3

Fatal error: Uncaught Error: Call to a member function query() on null in /var/www/html/usersc/plugins/alerts/footer.php:3 Stack trace: #0 {main} thrown in /var/www/html/usersc/plugins/alerts/footer.php on line 3