Fatal error: Uncaught Error: Class "WP_REST_Meta_Fields" not found in /home/koku7/public_html/wp-includes/rest-api/fields/class-wp-rest-post-meta-fields.php:17 Stack trace: #0 {main} thrown in /home/koku7/public_html/wp-includes/rest-api/fields/class-wp-rest-post-meta-fields.php on line 17