Do The Product Added It Cart Stored In Database

General General Questions
1

I found that the customers cannot place the order, when clicking the submit order, can I check what products were added by the customers in database??

2

When you submit any order , what's error you got ?

3

I found that the customers cannot place the order, when clicking the submit order, can I check what products were added by the customers in database??

Try to find your orders on the Orders -> View orders -> Gear icon on the top -> Incomplete orders

4

I found that the order only insert into orders, not insert into order_details.

5

I found that the order only insert into orders, not insert into order_details.

Check server error logs. Most possibly you will find error message there