Correct ordering in 1C-Bitrix

What we have:
1. There is a customized (externally) solution for placing an order in the online store 1C-Bitrix
2. 1C-Bitrix Business

What happened:
Unauthorized users no longer receive checkouts. Prior to this, an anonymous user was substituted.

What you need:
Fix.

I will inform the executor of the link and detailed information. Long-term cooperation is possible. Please do not disturb the studio, you need direct contact.