Why can't I configure access to the folder with a password (Nginx)?

Question

PHP

Guys, I'm already tormented, you need to restrict access to the folder with the script (The mini admin panel on Vuejs also uses PHP)
Server (Nginx, PHP-FPM, SSL)
There is a small js script in /utils
index file index.html
also pulls the file manager in php I set it up
using the standard method described in many manuals

location  ~* ^/utils/index.html {
                auth_basic "Hello, Manager";
                auth_basic_user_file  /etc/nginx/htpasswd;
        }

Gives a php file for download, you need to configure php-fpm, I do this

location  ~* ^/utils/index.html {
                auth_basic "Hello, Manager";
                auth_basic_user_file  /etc/nginx/htpasswd;

                fastcgi_pass unix:/var/run/php/php7.0-fpm.sock;
                include fastcgi_params;
                fastcgi_param  SCRIPT_FILENAME  $document_root$fastcgi_script_name;
        }

Asks for a password, logs in and gives 403 Access denied.
I tried a million options, I can’t anymore - nolp pliz :)