Missing Method in FrontsustainController

You are seeing this error because the action stylebox.css is not defined in controller FrontsustainController

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

Fatal: Confirm you have created the FrontsustainController::stylebox.css() in file : app/controllers/frontsustain_controller.php

<?php
class FrontsustainController extends AppController {
   function stylebox.css() {
   }
}
?>