Fatal error: Uncaught Error: Interface "PHP_UML_Output_Xmi_Builder" not found in C:\xampp\htdocs\php\pear\PHP\UML\Output\Xmi\AbstractBuilder.php:30 Stack trace: #0 {main} thrown in C:\xampp\htdocs\php\pear\PHP\UML\Output\Xmi\AbstractBuilder.php on line 30