Question about the old modification: "Additional categories Good"

Previously, I ordered the modification “Rework on the Horoshop application (categories and filters)” before launching the site - https://1b.app/ru/forum/integrations-with-online-stores/17406-dorabotka-po-prilozheniyu-horoshop- kategorii-i-filtri/. The site has already been launched, but additional categories are not loading for me. I tried different options: and for us either the API works only with the main category, or nothing works at all if you specify an additional category. Can you tell me what's wrong? The "Additional Good Categories" field has been made into a multi-list. Here is a test product https://our-store.com.ua/app/product/26504/edit/?tabid=21 Here is a directory where the entire structure is indicated (main and additional categories) https://our-store.com.ua/app/customobject/directory/44/ Thanks in advance!