How to create an order in Bitrix via api?

Question

1C-Bitrix

I already did something similar on one of the sites, but I used D7, and now I need to do the same for Bitrix 14, where the new methods do not work. For some reason, the old methods from the documentation do not work for me:
The search gives a lot of information only on new methods. Here is a 1 in 1 error like mine - the code of the rules is already for everyone, substituted its data ....
http://bx-qa.com/?qa=55886/add-order
Why is ORDER_ID empty?

Answer 1

I will answer myself:
To diagnose errors when using this method, you need to use

$ex = $APPLICATION->GetException(); echo $ex->GetString();