Hi,
The warning message
Notice: Trying to get property 'user_email' of non-object in /www/htdocs/w01a70ea/hikashop/media/com_hikashop/mail/order_admin_notification.preload.php on line 67"..."
indicates that HikaShop couldn't find the information about the user for that order while generating the email notification.
This is just a consequence of what you write in your last message:
In the backend the order also has no data about the customer.
If there is no data about the customer in the order, it's normal you get the warning. Having an order created without a user shouldn't normally happen, and that's the problem.
If other orders are fine, I think you can just ignore that order.
Having the user email address is normally mandatory to create an order. However there are at least 3 ways I can think of to bypass this:
- you could remove the "login" and "address" blocks from your "checkout workflow" in the HikaShop configuration. In that case, all the orders created through the checkout would be without user and without address.
- you could create a mass action which would remove the user and address from the order with a "before an order is created" trigger.
- if you use the "new" button in the orders listing in the backend, you can create an empty order, without a user.
I'm not saying you did these, it's just that I can only think of these at the moment but I'm sure there could be other ways, it could even be a 3rd party plugin interferring.
That's hard to say without more information.
I would recommend you continue monitoring futur orders for a while to make sure it doesn't happen anymore.