Fatal error: Uncaught Error: Class "Database" not found in C:\xampp\htdocs\invoicepro\includes\PartnerManager.php:6 Stack trace: #0 C:\xampp\htdocs\invoicepro\api\partners.php(22): PartnerManager->__construct() #1 {main} thrown in C:\xampp\htdocs\invoicepro\includes\PartnerManager.php on line 6