Fatal error: Uncaught Error: Class "PHP_UML_Input_ImporterFileScanner" not found in C:\xampp\htdocs\php\pear\PHP\UML\Input\XMI\FileScanner.php:28 Stack trace: #0 {main} thrown in C:\xampp\htdocs\php\pear\PHP\UML\Input\XMI\FileScanner.php on line 28