No access to bitrix library. How to fix?

Question

1C-Bitrix

Good afternoon!
Deployed a copy of the site on my server. I get errors in edit mode. In this case, menu items are not transferred precisely because of this. Tell me where to look to fix it.

Answer 1

it's about CORS
in order to understand how to fix the problem, you need to understand what kind of request is being blocked.
The feeling is that you have a library js file connected from another resource