404 Not Found nginx on Wordpress

Hi all,

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Please help me to resolve some error on my website.

I setup Centmin mod and wordpress for my website. I correct file : mydomain.com.conf in location : /usr/local/nginx/conf/conf.d with content
# redirect from non-www to www
# uncomment, save file and restart Nginx to enable
#server {
# listen 80;
# server_name mydomain.com;
# return 301 $scheme://www.mydomain.com$request_uri;
# }

server {
server_name mydomain.com www.mydomain.com;

# ngx_pagespeed & ngx_pagespeed handler
include /usr/local/nginx/conf/pagespeed.conf;
include /usr/local/nginx/conf/pagespeedhandler.conf;
include /usr/local/nginx/conf/pagespeedstatslog.conf;

# limit_conn limit_per_ip 16;
# ssi on;

access_log /home/nginx/domains/mydomain.com/log/access.log combined buffer=32k;
error_log /home/nginx/domains/mydomain.com/log/error.log;

root /home/nginx/domains/mydomain.com/public;

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

include /usr/local/nginx/conf/staticfiles.conf;
include /usr/local/nginx/conf/php.conf;
include /usr/local/nginx/conf/drop.conf;
#include /usr/local/nginx/conf/errorpage.conf;
}

My website use link (without .html) , like this : www.mydomain.com/123/support/

But i get "404 not found" and I also can 't restart nginx, i get message error :

[root@newvps ~]# service nginx restart
nginx: [emerg] unknown "arg" variable
nginx: configuration file /usr/local/nginx/conf/nginx.conf test failed


Please tell me the detail to fix this issue ASAP .Thanks a lot.
ps : I use Wp Super Cache on my website.

 

Thanks Admin,

But in this case, how can i resolve error "404 NOT FOUND" ? Please help.

Thanks.