nginx. SMS from the Telegram Web client does not reach, Nginx proxying to the Telegram API is configured. How to fix?

Question

Nginx

Hello.
Webogram is running on the backend via pm2, running on localhost:8000/app. Everything is standard according to the instructions.
Then I set up mtproto.js and nginx according to this material https://gist.github.com/stek29/47a4a02c4fb82d79dbe...
Now all API requests go to addresses, for example https://mywebsite.ru/venus/apiw1
I go through the browser I enter the number. SMS supposedly sent, but nothing goes through =\
What could be the problem? Judging by the Network log in the browser at https://mywebsite.ru/venus/apiw1 post, the request goes successfully
Thanks in advance for the answers