[nico_swd]

Try this.

Open /includes/adminfunctions_navpanel.php

And find this piece of code (approx line 161)

PHP Code:

if (VB_AREA != 'AdminCP')
{
    echo $controls . $_NAV;
    return;
} 


Add this under the code above and see if it works.

PHP Code:

if (!is_array($groupid))
{
    $groupid = array();
}