Temp fix (using functions.php):
function fix_aiowps_login_classes( $classes ) {
$action = isset($_REQUEST['action']) ? $_REQUEST['action'] : 'login';
if ( isset($_GET['key']) )
$action = 'resetpass';
// validate action so as to default to the login screen
if ( !in_array( $action, array( 'postpass', 'logout', 'lostpassword', 'retrievepassword', 'resetpass', 'rp', 'register', 'login' ), true ) && false === has_filter( 'login_form_' . $action ) )
$action = 'login';
$classes[0] = 'login-action-' . $action;
return $classes;
}