Brief
We have updated the file block_order_data_preview.php' for version 3.6.
 
Description
You may receive the Notice: Undefined variable on the order_confirmation page if some settings for order confirmation page are missed in the shop.
 
Solution
We would recommend you to download an updated version of the file from here:
http://www.viart.com/downloads/block_order_data_preview-3.6.zip
 
Further, extract the above mentioned file into the 'blocks' folder of your shop. Do not forget to make a backup copy of the current file in case something goes wrong.