Having an issue opening a documentary for vehicles. Getting this message:

Management: Vehicle and pictures validation
Warning: Undefined variable $db in /var/www/imcdb/validate.php on line 69 Fatal error: Uncaught Error: Call to a member function query() on null in /var/www/imcdb/validate.php:69 Stack trace: #0 {main} thrown in /var/www/imcdb/validate.php on line 69