Hi webaware, thank you for your reponse.
I used to use it normally, not update anything. Just one day it turns errorneous.
However, although it returns INTERNAL SERVER ERROR, but the order is still recorded in Admin Dashboard & my eWay sandbox still records the income. It just that the page doesn’t take people to order confirmation page with all order details as usual.
Can you guess what might cause the problem?
Many thanks,
Q