Getting a blank page with File not found

I’m trying to install a fresh new nextcloud on my server.

Server spec :
CentOS 7
webserver : nginx 1.12.2
Database: 5.5.60-MariaDB
PHP 7.2.19
using php-fpm

SELINUX is disabled

Here is my nginx conf file :

upstream php-handler {
    server 127.0.0.1:9000;
}
server {
    listen 80;
    listen [::]:80;
    server_name _;
    add_header X-Content-Type-Options nosniff;
    add_header X-XSS-Protection "1; mode=block";
    add_header X-Robots-Tag none;
    add_header X-Download-Options noopen;
    add_header X-Permitted-Cross-Domain-Policies none;
    add_header Referrer-Policy no-referrer;
    fastcgi_hide_header X-Powered-By;
    root /usr/share/nginx/html;
    location = /robots.txt {
        allow all;
        log_not_found off;
        access_log off;
    }
    location = /.well-known/carddav {
      return 301 http://$host/remote.php/dav;
    }
    location = /.well-known/caldav {
      return 301 http://$host/remote.php/dav;
    }
    client_max_body_size 10G;
    fastcgi_buffers 64 4K;
    gzip on;
    gzip_vary on;
    gzip_comp_level 4;
    gzip_min_length 256;
    gzip_proxied expired no-cache no-store private no_last_modified no_etag auth;
    gzip_types application/atom+xml application/javascript application/json application/ld+json application/manifest+json application/rss+xml application/vnd.geo+json application/vnd.ms-fontobject application/x-font-ttf application/x-web-app-manifest+json application/xhtml+xml application/xml font/opentype image/bmp image/svg+xml image/x-icon text/cache-manifest text/css text/plain text/vcard text/vnd.rim.location.xloc text/vtt text/x-component text/x-cross-domain-policy;
    location / {
        rewrite ^ /index.php$request_uri;
    }
    location ~ ^\/(?:build|tests|config|lib|3rdparty|templates|data)\/ {
        deny all;
    }
    location ~ ^\/(?:\.|autotest|occ|issue|indie|db_|console) {
        deny all;
    }
    location ~ ^\/(?:index|remote|public|cron|core\/ajax\/update|status|ocs\/v[12]|updater\/.+|ocs-provider\/.+|ocm-provider\/.+)\.php(?:$|\/) {
        fastcgi_split_path_info ^(.+?\.php)(\/.*|)$;
        include /etc/nginx/fastcgi_params;
        fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
        fastcgi_param PATH_INFO $fastcgi_path_info;
        #fastcgi_param HTTPS on;
        fastcgi_param modHeadersAvailable true;
        fastcgi_param front_controller_active true;
        fastcgi_pass php-handler;
        fastcgi_intercept_errors on;
        fastcgi_request_buffering off;
    }

    location ~ ^\/(?:updater|ocs-provider|ocm-provider)(?:$|\/) {
        try_files $uri/ =404;
        index index.php;
    }
    location ~ \.(?:css|js|woff2?|svg|gif)$ {
        try_files $uri /index.php$request_uri;
        add_header Cache-Control "public, max-age=15778463";
        add_header X-Content-Type-Options nosniff;
        add_header X-XSS-Protection "1; mode=block";
        add_header X-Robots-Tag none;
        add_header X-Download-Options noopen;
        add_header X-Permitted-Cross-Domain-Policies none;
        add_header Referrer-Policy no-referrer;
        access_log off;
    }
    location ~ \.(?:png|html|ttf|ico|jpg|jpeg)$ {
        try_files $uri /index.php$request_uri;
        access_log off;
    }
}

My php-fpm config file (change I made):

user = nginx
group = nginx
env[HOSTNAME] = $HOSTNAME
env[PATH] = /usr/local/bin:/usr/bin:/bin
env[TMP] = /tmp
env[TMPDIR] = /tmp
env[TEMP] = /tmp

I restarted all service. Then I downloaded nextcloud with my tiny script:

cd /tmp
wget https://github.com/nextcloud/server/archive/v16.0.1.tar.gz
tar xvf v16.0.1.tar.gz
rm v16.0.1.tar.gz
mv server-16.0.1/ /usr/share/nginx/html/nextcloud
if [ ! -d /usr/share/nginx/html/nextcloud/data ]; then
  mkdir /usr/share/nginx/html/nextcloud/data
fi
chown -R nginx:nginx /usr/share/nginx/html/nextcloud

When I access on the web interface I gave the following output :

Composer autoloader not found, unable to continue. Check the folder “3rdparty”. Running “git submodule update --init” will initialize the git submodule that handles the subfolder “3rdparty”.

I can’t find any related issue.

Thanks for any help

You should better download the official Nextcloud 16.0.3 archive from this website, which contains all required modules.

Thanks for the answer, I did get the source from the new link and now I have a blank page with File not found. when I open on http://IP/nextcloud.
i don’t know why

My updated tiny script :

cd /tmp
curl -o nextcloud-16-0-1.tar.bz2 https://download.nextcloud.com/server/releases/nextcloud-16.0.1.tar.bz2
tar -jxvf nextcloud-16-0-1.tar.bz2
rm nextcloud-16.0.1.tar.bz2
mv nextcloud/ /usr/share/nginx/html/nextcloud
if [ ! -d /usr/share/nginx/html/nextcloud/data ]; then
  mkdir /usr/share/nginx/html/nextcloud/data
fi
chown -R nginx:nginx /usr/share/nginx/html/nextcloud

Error I have in /var/log/nginx/error.log

[error] 16847#0: *1007 FastCGI sent in stderr: "Primary script unknown" while reading response header from upstream, client: 192.168.0.2, server: _, request: "GET / HTTP/1.1", upstream: "fastcgi://127.0.0.1:9000", host: "192.168.0.1"

It look like I don’t have all files. I checked if file /usr/share/nginx/html/nextcloud/lib/private/route/router.php exist but doesn’t seem to be there

EDIT :

I redownloaded using wget and now I have the file /usr/share/nginx/html/nextcloud/lib/private/route/router.php but my issue remain the same

It was a miss configuration in my nginx conf file. I had to change :

root /usr/share/nginx/html;

to

root /usr/share/nginx/html/nextcloud;