Plesk 12.x / Linux :: XenForo Nginx Friendly URLs

I'm trying to use nginx php-fpm on my forum, and to set friendly url's, I am told to add this to nginx config:

Code:
location / {
try_files $uri $uri/ /index.php?$uri&$args;
index index.php index.html;

[Code] ....

I try adding this using the Additional Nginx Directives, and get this error:

Code:
Invalid nginx configuration: nginx: [emerg] duplicate location "/" in /var/www/vhosts/system/domain.com/conf/vhost_nginx.conf:1 nginx: configuration file /etc/nginx/nginx.conf test failed

I think if my domain was in a folder, this wouldn't be a problem. I really don't want to change that, though.