Fatal error: Uncaught Error: Class 'IXR_Server' not found in D:\htdocs2\a-resultat.dk\wp-includes\IXR\class-IXR-introspectionserver.php:9 Stack trace: #0 {main} thrown in D:\htdocs2\a-resultat.dk\wp-includes\IXR\class-IXR-introspectionserver.php on line 9