Why can't I retry the request from the browser manually (using Postman, python)?

Question

Web servers

There is a site form ***************

I want to execute this request "manually" - I use Postman. I copy the request from the browser (from DevTools as curl)
I add it to Postman - I try to execute it - I get 403 (in the browser "wrong password" - 200)

Site on wordpress, hosting is normal.
JS has nothing to do with it - everything on the site works with disabled JS.
In the case of python had the same.

Example of "correct work"

Answer 1

the root of all evil is the HTTP version. first time I encounter this. simple and almost effective.

Answer 2

Weird.
From postman everything works fine for me.
Maybe the problem is that you entered the wrong password too many times?