Ticket #39610: 39610.0.diff

src/wp-includes/class-wp-customize-nav-menus.php

@@ -786 +786 @@
          * @return WP_Post|WP_Error Inserted auto-draft post object or error.
          */
         public function insert_auto_draft_post( $postarr ) {
-                if ( ! isset( $postarr['post_type'] ) || ! post_type_exists( $postarr['post_type'] )  ) {
+                if ( ! isset( $postarr['post_type'] )  ) {
                         return new WP_Error( 'unknown_post_type', __( 'Invalid post type.' ) );
                 }
                 if ( empty( $postarr['post_title'] ) ) {