Warning: Undefined variable $pdo in C:\xampp\htdocs\bookingsystem\admin\partials\events-panel.php on line 3

Fatal error: Uncaught Error: Call to a member function query() on null in C:\xampp\htdocs\bookingsystem\admin\partials\events-panel.php:3 Stack trace: #0 {main} thrown in C:\xampp\htdocs\bookingsystem\admin\partials\events-panel.php on line 3