Fatal error: Uncaught Error: Class "PKP\metadata\MetadataDataObjectAdapter" not found in C:\xampp\htdocs\journal\plugins\metadata\dc11\filter\Dc11SchemaArticleAdapter.php:41 Stack trace: #0 {main} thrown in C:\xampp\htdocs\journal\plugins\metadata\dc11\filter\Dc11SchemaArticleAdapter.php on line 41