Grey blank screen with phpvirtualbox 4.3-2

[Per]

I just upgraded to 4.3-2 to match my current Virtualbox version.

When I go to the phpvirtualbox web page, a "Loading" message flashes by briefly and then I'm stuck at a grey screen.

I stepped the code in index.html, and execution hits this return statement:

// Was there an error? Assume it was displayed and just return from function
if($('#vboxPane').data('vboxSession') && !$('#vboxPane').data('vboxSession').success) {
    return;
}

But no error message is being displayed.

How can I figure out the error?

[Ian Moore]

Odd. Can you make a backup of your current config.php and create a new one from config.php-example and see if that makes a difference?