Why can’t I connect to the wordpress install page with Nginx?

I’m a newbie of WordPress. My environment is Ubuntu 18 + Nginx + PHP 7.

Following the tutorial(https://www.myfreax.com/how-to-install-wordpress-with-nginx-on-ubuntu-18-04/), the wordpress directory was placed on /var/www/html/device1.com.

Then I config the nginx, here is my nginx config:

server {     listen 80;     server_name www.device1.com device1.com;      server_name device1.com;      root /var/www/html/device1.com;     index index.php;       # log files     access_log /var/log/nginx/device1.com.access.log;     error_log /var/log/nginx/device1.com.error.log;      location = /favicon.ico {         log_not_found off;         access_log off;     }      location = /robots.txt {         allow all;         log_not_found off;         access_log off;     }      location / {         try_files $  uri $  uri/ /index.php?$  args;     }      location ~ \.php$   {         include snippets/fastcgi-php.conf;         fastcgi_pass unix:/run/php/php7.2-fpm.sock;     }      location ~* \.(js|css|png|jpg|jpeg|gif|ico|svg)$   {         expires max;         log_not_found off;     }  } 

But, when I tried to connect to http://device1.com/wp-admin/install.php the Nginx responses 404, instead of returning the wordpress install page.

I don’t have any idea of checking the issue. Thanks for your suggestion.