Fatal error: Uncaught Error: Class "APP\core\Application" not found in C:\xampp\htdocs\ojs\lib\pkp\classes\cliTool\UpgradeTool.php:25 Stack trace: #0 {main} thrown in C:\xampp\htdocs\ojs\lib\pkp\classes\cliTool\UpgradeTool.php on line 25