Yandex robot gives a 403 error on the verification file and on all other files of the domain

Yandex robot gives a 403 error on the verification file and on all other files of the domain. It is not possible to show the site https://web-forum.page.gd/ to the Yandex robot for indexing and for tracking. The verification code is clearly displayed Checking the server response sees a 403 error. Help to make the server response 200. Have you blocked the entire Russian region?