Fatal error: Uncaught Error: Class "PHP_UML_Metamodel_TypeResolver" not found in C:\xampp\htdocs\php\pear\PHP\UML\Metamodel\TypeResolverById.php:29 Stack trace: #0 {main} thrown in C:\xampp\htdocs\php\pear\PHP\UML\Metamodel\TypeResolverById.php on line 29