Hi all,
I have created a controller which has multiform on it.
The form shows fine but it doesn't redirct on submission correctly. I get a 404 error

<?php

class FBController extends Controller 
{ 
	static $allowed_actions = array (); 
	
	
	function FacebookSetupMF() {
             return new FacebookSetupMF($this, 'FacebookSetupMF');
   	}
}

form shows correctly at domain.com/FBController/
but when I submit it goes to domain.com/FacebookSetupMF?MultiFormSessionID=cb7feaaf9e07dc5ff0fa6f8f48d49100ae289bc8

and I get a Page not found?

Did you ever find a solution to this? I am having exactly this challenge :)

In this example SilverStripe is looking for a page called FacebookSetupMF, when in fact this is meant as an Action parameter for your controller telling it to call the FacebookSetupMF() function instead.

So you have to tell your controller to allow that:

static $allowed_actions = array ('FacebookSetupMF');