User Group after purchase free item bug

Our store has a free item called 8 Dimensions Book Map. "Purchase" of that item should set the User Group After Purchase to "Book Map". While the checkout of the item works perfectly (I use HikaSerial to assign an access code for the product), the user is not added to the group.

I would think the problem is that the checkout of a free item skips some code where the User Group should be set.

Can you try to add the code:

function onAfterOrderCreate( &$order,&$send_email){
return $this->onAfterOrderUpdate( $order,$send_email);
}

before the code:
function onAfterOrderUpdate(&$order,&$send_email){

in the file plugins/hikashop/group/group.php and see if that helps ?

That corrected the problem.

Sorry it took so long for me to get this tested!