Fatal error: Uncaught Error: Class 'Yoast_Update_Manager' not found in /users/nandini/www/wordpress-seo/admin/license-manager/class-plugin-update-manager.php:6 Stack trace: #0 {main} thrown in /users/nandini/www/wordpress-seo/admin/license-manager/class-plugin-update-manager.php on line 6