Fatal error: Uncaught Error: Class 'WP_Widget' not found in D:\htdocs2\a-resultat.dk\wp-includes\widgets\class-wp-nav-menu-widget.php:17 Stack trace: #0 {main} thrown in D:\htdocs2\a-resultat.dk\wp-includes\widgets\class-wp-nav-menu-widget.php on line 17