WPML / Woocommerce direct URL to specific currency

Hello there,

I am running WPML & Woocommerce for an international store. We list our products with Google Shopping and they have a requirement that the URL defaults to the specific currency for the country the ad is place in. This is not possible directly from WPML because their currency switcher requires you to select it from a menu once on the site. Bruno from WPML support has a solution that can be found here:

The fix uses this code in the Functions.php file in my child theme:

add_action( 'wcml_client_currency', 'currency' );
function currency( $current_currency ) {
    global $woocommerce,$sitepress;
  
    $currency = isset( $_GET['price'] ) ? esc_attr( $_GET['price'] ) : $current_currency;
    $currency = strtoupper( $currency );
  
    $woocommerce->session->set('client_currency', $currency);    
  
    return $currency;
}

This works perfectly for me for the feature I need but breaks other parts of WPML & Woocommerce. It works fine in 2012, 2013 but breaks when I active Enfold. For instance, when listing products in WP-Admin, the price column shows this error for a variable product :

Fatal error: Call to a member function set() on a non-object in /nas/wp/www/staging/medafore/wp-content/themes/Enfold-Child-Theme-Template/functions.php on line 13

Line thirteen is this from the code above:

$woocommerce->session->set('client_currency', $currency);

It also stops me from saving WPML settings from the WPML admin area.

Any thoughts why this works in 2012 but not Enfold?

Thanks!
Keith