403 Forbidden

[mdm100]

403 Forbidden  
nginx/1.12.1 (Ubuntu)

Distributor ID: Ubuntu
Description:    Ubuntu 17.10
Release:        17.10
Codename:       artful

I have many virtual sites running on my server identical to this one, but
for some reason I have run into the 403 wall.

Permissions for my virtual website dir 
sudo chown -R www-data:www-data /var/www/html/C1/
sudo chmod -R 755 /var/www/html/C1/
results
drwxrwxrwx  3 www-data www-data 4096 May 23 12:37 C1

The virtual directory is as follows.. and is linked to.
sudo ln -s /etc/nginx/sites-available/c1 /etc/nginx/sites-enabled/

server {
    listen 80;
    listen [::]:80;
    root /var/www/html/C1;
    index  index.html index.php index.htm;
    server_name  c1inventory.xxxxxxx.com;

    location / {
        try_files $uri $uri/ /index.php?$query_string;
    }


    location ~ \.php$ {
         try_files $uri =404;
         fastcgi_split_path_info  ^(.+\.php)(/.+)$;
         fastcgi_index            index.php;
         fastcgi_pass             unix:/var/run/php/php7.1-fpm.sock;
         include                  fastcgi_params;
         fastcgi_param   PATH_INFO       $fastcgi_path_info;
         fastcgi_param   SCRIPT_FILENAME
$document_root$fastcgi_script_name;
    }

}

Dump from the nginx error log.

2018/05/23 14:15:49 [error] 1530#1530: *1 directory index of
"/var/www/html/C1/" is forbidden, client: 67.127.276.257, server:
c1inventory.xxxxxx.com, request: "GET / HTTP/1.1", host:
"c1inventory.xxxxxx.com"

Any help is greatly appreciated.

Thanks.

Posted at Nginx Forum: https://forum.nginx.org/read.php?2,279925,279925#msg-279925