Seems that your config is correct (docs).

All our Elgg productions works on Nginx w/o any issues.

Can you explain about server errors with more details?

Can you explain about server errors with more details?

 More no information. Logs empty.

I have enabled open_basedir, but when I tested it unplugged. I changed a lot of configuration options. I even just copied nginx config from elgg setup directory. Anyway the exact same error.

# Nginx -V
nginx version: nginx / 1.11.1
built by gcc 5.3.1 20160406 (Red Hat 5.3.1-6) (GCC)
built with OpenSSL 1.0.2h-fips 3 May 2016
TLS SNI support enabled
configure arguments: --prefix = / usr / share / nginx --sbin-path = / usr / sbin / nginx --conf-path = / etc / nginx / nginx.conf --error-log-path = / var / log / nginx / error.log --http-log-path = / var / log / nginx / access.log --http-client-body-temp-path = / var / lib / nginx / tmp / client_body --http -proxy-temp-path = / var / lib / nginx / tmp / proxy --http-fastcgi-temp-path = / var / lib / nginx / tmp / fastcgi --http-uwsgi-temp-path = / var / lib / nginx / tmp / uwsgi --http-scgi-temp-path = / var / lib / nginx / tmp / scgi --pid-path = / run / nginx.pid --lock-path = / run / lock / subsys / nginx --user = nginx --group = nginx --with-file-aio --with-ipv6 --with-http_ssl_module --with-http_v2_module --with-http_realip_module --with-http_addition_module --with-http_xslt_module --with-http_image_filter_module --with-http_geoip_module --with-http_sub_module --with-http_dav_module --with-http_flv_module --with-http_mp4_module --with-http_gunzip_module --with-http_gzip_static_module --with-http_random_index_module --with-http_secure_link_module --with-http_degradation_module --with-http_stub_status_module --with-http_perl_module --with-mail --with-mail_ssl_module --with-pcre --with-pcre-jit --with-google_perftools_module --with-debug --with -stream --with-cc-opt = '- O2 -g -pipe -Wall -Werror = format-security -Wp, -D_FORTIFY_SOURCE = 2 -fexceptions -fstack-protector-strong --param = ssp-buffer-size = 4 -grecord-gcc-switches -specs = / usr / lib / rpm / redhat / redhat-hardened-cc1 -m64 -mtune = generic '--with-ld-opt =' - Wl, -z, relro -specs = / usr / lib / rpm / redhat / redhat-hardened-ld -Wl, -E '

# Php -v
PHP 7.0.7 (cli) (built: May 25, 2016 17:47:24) (NTS)
Copyright (c) 1997-2016 The PHP Group
Zend Engine v3.0.0, Copyright (c) 1998-2016 Zend Technologies
    with Zend OPcache v7.0.6-dev, Copyright (c) 1999-2016, by Zend Technologies

But what going on: you can't install Elgg, or other troubles?

But what going on: you can't install Elgg, or other troubles?

When used scheme USER < NGINX [PROXY] < NGINX [PHP-FPM] I can not install elgg. I described the problem, you know. Now I have changed scheme on USER < NGINX [PHP-FPM]. In this scheme, the installation goes okay.

But I want check all functions. I decided to click button "Upgrade" in AdminCP. And instead of update page, I get the error:

You must update your .htaccess file so that the path is injected into the GET parameter __elgg_uri (you can use install/config/htaccess.dist as a guide).

You got this message.

Try to go to Upgrades under Configure section. What you see in there?

Problem solved!
The problem was this:

  # -------------------------------------------------------------------------- #
  # Auth.
  # -------------------------------------------------------------------------- #

  auth_basic "Maintenance";
  auth_basic_user_file "/maintenance.htpasswd";

When enabled nginx auth_basic, there is a problem with upgrade.php. Strange ...

Ok. congrats!

Yes exactly. Now again I included auth_basic and again there was a problem.
@RvR thank you for your help and support!!! :)

@Kitsune Solar