Missing Method in SitemapController

You are seeing this error because the action function.session-start is not defined in controller SitemapController

If you want to customize this error message, create app/views/errors/missing_action.thtml.

Fatal: Confirm you have created the SitemapController::function.session-start() in file : app/controllers/sitemap_controller.php

<?php
class SitemapController extends AppController {
   function function.session-start() {
   }
}
?>