Quote Originally Posted by ak6000 View Post
For some reason, I don't remember installing Super Orders!

In any case, I checked order.php, and found the date_diff on line 150 as reported by error log and based on the link you provided I changed it to zen_date_diff.

However, I found the same function on line 56 as well! Do I need to change that one also?
So do you actually have super orders installed?

You will need to ask in that thread for super orders 2, as i am actually not familiar with it, I just recognised the error