503 ERROR Service Temporarily Unavailable

Hello everybody so i switched to centmind mod because of all the awesomness but i kinda have an issue that when i access my website i get that error, how can i know whats causing it?
Also i can access the admincp just fine but no the forum index.
Edit: i tried to disable friendly url in acp then worked, i enabled friendly url again and everything seemed ok ut when i logged out of the forum i got 503 error again and now i can only access acp again :/

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I'm using xenforo and here is the configuration file

Code:

server {
  server_name domain.com www.domain.com;
  return 301 https://domain.com$request_uri;

}

# https SSL SPDY vhost
server {
        listen 443 ssl spdy;
            server_name domain.com;

        ssl_certificate      /usr/local/nginx/conf/ssl/domaincom/domain.com-unified.crt;
        ssl_certificate_key  /usr/local/nginx/conf/ssl/domaincom/ssl.key;
        ssl_protocols SSLv3 TLSv1 TLSv1.1 TLSv1.2;
        ssl_session_cache      shared:SSL:10m;
        ssl_session_timeout  10m;
        ssl_ciphers ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES256-GCM-SHA384:DHE-RSA-AES128-GCM-SHA256:DHE-DSS-AES128-GCM-SHA256:kEDH+AESGCM:ECDHE-RSA-AES128-SHA256:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES128-SHA:ECDHE-ECDSA-AES128-SHA:ECDHE-RSA-AES256-SHA384:ECDHE-ECDSA-AES256-SHA384:ECDHE-RSA-AES256-SHA:ECDHE-ECDSA-AES256-SHA:DHE-RSA-AES128-SHA256:DHE-RSA-AES128-SHA:DHE-DSS-AES128-SHA256:DHE-RSA-AES256-SHA256:DHE-DSS-AES256-SHA:DHE-RSA-AES256-SHA:AES128-GCM-SHA256:AES256-GCM-SHA384:ECDHE-RSA-RC4-SHA:ECDHE-ECDSA-RC4-SHA:AES128:AES256:RC4-SHA:HIGH:!aNULL:!eNULL:!EXPORT:!DES:!3DES:!MD5:!PSK:!kEDH:!EDH:!CAMELLIA;
        ssl_prefer_server_ciphers   on;
        add_header Alternate-Protocol  443:npn-spdy/3;
        add_header Strict-Transport-Security "max-age=31536000; includeSubdomains;";
        #add_header  X-Content-Type-Options "nosniff";
        #add_header X-Frame-Options DENY;
        # nginx 1.5.9+ or higher
        # http://nginx.org/en/docs/http/ngx_http_spdy_module.html#spdy_headers_comp
        # http://nginx.org/en/docs/http/ngx_http_ssl_module.html#ssl_buffer_size
        # spdy_headers_comp 0;
        # ssl_buffer_size 4k;

        # enable ocsp stapling
        resolver 8.8.8.8;
        ssl_stapling on;
        ssl_stapling_verify on;
        ssl_trusted_certificate /usr/local/nginx/conf/ssl/domaincom/domain.com-trusted.crt;

  # limit_conn limit_per_ip 16;
  # ssi  on;

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

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

# 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;

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

# block common exploits, sql injections etc
# include /usr/local/nginx/conf/block.conf;

  # Enables directory listings when index file not found
  #autoindex  on;

  }

  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;
}

 

Forum is located in root and yes its valid ssl certificate that without your guidance i would have never been able to set it up.

 

Em i found an index.html in my root folder so i removed it and everything works fine now.

 

Doh i think i spoke too soon, error is back again when i removed the 503.html file and maintenance.html from the root now i got 404 not found whenever i access my forum, i'm so lost.

 

Nop i didint removed any xenforo file and i checked the error log and i only see hotlinking of some of my forum images but nothing really related to the error and i see the 404 error when i get logged out automatically, even if i tick to stay logged in i get logged out and i see that 404 error page :s