Need to fix the error on the website.

Need to fix the error on the website.

After the shipment on the website to know the price of the product from the managers does not appear that the letter was sent. though in fact it is sent and the client tries to send 2-3 times to know the price, without notice of the administration... or knocks from the error screen attached below.

is it possible to find and eliminate, if you will provide a backup site and backup database?