You are running nginx, but your current configuration prevents a successful installation. Please fix the PATH_INFO support for PHP

location ~ \.php$ {
                #try_files $uri =404;
                fastcgi_split_path_info ^(.+\.php)(/.+)$;
                fastcgi_pass unix:/var/run/php5-fpm.sock;
                fastcgi_index index.php;
        fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
        fastcgi_param PATH_INFO $fastcgi_path_info;
        #try_files $fastcgi_script_name =404;
        if (!-e $document_root$fastcgi_script_name) {
        return 404;
        }




                include fastcgi_params;
                fastcgi_read_timeout 600;




        }

user  nginx;
worker_processes  2;




error_log  /var/log/nginx/error.log warn;
pid        /var/run/nginx.pid;




events {
    worker_connections  1024;
}




http {
    include       /etc/nginx/mime.types;
    default_type  application/octet-stream;




    log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
                      '$status $body_bytes_sent "$http_referer" '
                      '"$http_user_agent" "$http_x_forwarded_for"';




    access_log  /var/log/nginx/access.log  main;




    #tcp_nopush     on;




        sendfile on;
        #sendfile_max_chunk 1m;
        tcp_nopush  on;
        tcp_nodelay off;
        server_tokens off;
        server_name_in_redirect off;




        keepalive_timeout  60;
        keepalive_disable msie6;




        gzip on;
        gzip_vary   on;
        gzip_disable "MSIE [1-6]\.";
        gzip_static on;
        gzip_min_length   1400;
        gzip_buffers      32 8k;
        gzip_http_version 1.0;
        gzip_comp_level 5;
        gzip_proxied    any;
        gzip_types text/plain text/css text/xml application/javascript application/x-javascript application/xml application/xml+rss application/ecmascript application/json image/svg+xml;




    client_body_buffer_size 256k;
    client_body_in_file_only off;
    client_body_timeout 60s;
    client_header_buffer_size 64k;
    ## how long a connection has to complete sending
    ## it's headers for request to be processed
    client_header_timeout  20s;
    client_max_body_size 10240k;
    connection_pool_size  512;
    directio  4m;
    ignore_invalid_headers on;
    large_client_header_buffers 8 64k;
    output_buffers   8 256k;
    postpone_output  1460;
    #proxy_temp_path  /tmp/nginx_proxy/;
    request_pool_size  32k;
    reset_timedout_connection on;
    send_timeout     60s;
    types_hash_max_size 2048;
    server_names_hash_bucket_size 64;




    include /etc/nginx/conf.d/*.conf;
}

server {
       listen 80; # listen for IPv4
       listen [::]:80; # listen for IPv6
        server_name  www.sociallyuncensored.eu;
    return 301 $scheme://sociallyuncensored.eu$request_uri;
}




server {
       listen 80; # listen for IPv4
       listen [::]:80; # listen for IPv6
       server_name  sociallyuncensored.eu;




      access_log  /var/log/nginx/log/sociallyuncensored.eu.log  main;
    error_log /var/log/nginx/log/sociallyuncensored.eu.error.log;

      root   /usr/share/nginx/sociallyuncensored.eu/public_html;




    include /etc/nginx/rewrites.conf;




    location / {
    add_header Access-Control-Allow-Origin "*";
                index index.php index.html index.htm;
                try_files $uri $uri/ /index.php?$uri&$args;
                location /internal_data {
                        location ~ \.(data|html|php)$ {
                                internal;
                        }
                        internal;
                }
                location /library {
                        location ~ \.(default|html|php|txt|xml)$ {
                                internal;
                        }
                        internal;
                }
        }




        location /admin.php {
        auth_basic "Private";
        auth_basic_user_file /usr/share/nginx/htpasswd;
    include /etc/nginx/php.conf;
        }




        location /install/ {
    index index.php index.html index.htm;
        auth_basic "Private";
        auth_basic_user_file /usr/share/nginx/htpasswd;
        include /etc/nginx/php.conf;
        }




        include /etc/nginx/php.conf;
        include /etc/nginx/staticfiles.conf;
}

location ~ \.php$ {
                #try_files $uri =404;
                fastcgi_split_path_info ^(.+\.php)(/.+)$;
                fastcgi_pass unix:/var/run/php5-fpm.sock;
                fastcgi_index index.php;
        fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
        fastcgi_param PATH_INFO $fastcgi_path_info;
        #try_files $fastcgi_script_name =404;
        if (!-e $document_root$fastcgi_script_name) {
        return 404;
        }




                include fastcgi_params;
                fastcgi_read_timeout 600;




        }

location ~* \.(3gp|gif|jpg|jpeg|png|ico|wmv|avi|asf|asx|mpg|mpeg|mp4|pls|mp3|mid|wav|swf|flv|exe|zip|tar|rar|gz|tgz|bz2|uha|7z|doc|docx|xls|xlsx|pdf|iso)$ {
        gzip_static off;
        #add_header Pragma public;
        add_header Cache-Control "public, must-revalidate, proxy-revalidate";
        access_log off;
        expires 30d;
        break;
        }




    location ~* \.(js)$ {
        #add_header Pragma public;
        add_header Cache-Control "public, must-revalidate, proxy-revalidate";
        access_log off;
        expires 30d;
        break;
        }




    location ~* \.(css)$ {
        #add_header Pragma public;
        add_header Cache-Control "public, must-revalidate, proxy-revalidate";
        access_log off;
        expires 30d;
        break;
        }




    location ~* \.(html|htm|txt)$ {
        #add_header Pragma public;
        add_header Cache-Control "public, must-revalidate, proxy-revalidate";
        access_log off;
        expires 1d;
        break;
        }




    location ~* \.(eot|svg|ttf|woff)$ {
        #add_header Pragma public;
        add_header Cache-Control "public, must-revalidate, proxy-revalidate";
        access_log off;
        expires 30d;
        break;
        }

;;;;;;;;;;;;;;;;;;;;;
; FPM Configuration ;
;;;;;;;;;;;;;;;;;;;;;




; All relative paths in this configuration file are relative to PHP's install
; prefix (/usr). This prefix can be dynamically changed by using the
; '-p' argument from the command line.




; Include one or more files. If glob(3) exists, it is used to include a bunch of
; files from a glob(3) pattern. This directive can be used everywhere in the
; file.
; Relative path can also be used. They will be prefixed by:
;  - the global prefix if it's been set (-p argument)
;  - /usr otherwise
;include=/etc/php5/fpm/*.conf




;;;;;;;;;;;;;;;;;;
; Global Options ;
;;;;;;;;;;;;;;;;;;




[global]
; Pid file
; Note: the default prefix is /var
; Default Value: none
pid = /run/php5-fpm.pid




; Error log file
; If it's set to "syslog", log is sent to syslogd instead of being written
; in a local file.
; Note: the default prefix is /var
; Default Value: log/php-fpm.log
error_log = /var/log/php5-fpm.log




; syslog_facility is used to specify what type of program is logging the
; message. This lets syslogd specify that messages from different facilities
; will be handled differently.
; See syslog(3) for possible values (ex daemon equiv LOG_DAEMON)
; Default Value: daemon
;syslog.facility = daemon




; syslog_ident is prepended to every message. If you have multiple FPM
; instances running on the same server, you can change the default value
; which must suit common needs.
; Default Value: php-fpm
;syslog.ident = php-fpm




; Log level
; Possible Values: alert, error, warning, notice, debug
; Default Value: notice
;log_level = notice




; If this number of child processes exit with SIGSEGV or SIGBUS within the time
; interval set by emergency_restart_interval then FPM will restart. A value
; of '0' means 'Off'.
; Default Value: 0
;emergency_restart_threshold = 0




; Interval of time used by emergency_restart_interval to determine when 
; a graceful restart will be initiated.  This can be useful to work around
; accidental corruptions in an accelerator's shared memory.
; Available Units: s(econds), m(inutes), h(ours), or d(ays)
; Default Unit: seconds
; Default Value: 0
;emergency_restart_interval = 0




; Time limit for child processes to wait for a reaction on signals from master.
; Available units: s(econds), m(inutes), h(ours), or d(ays)
; Default Unit: seconds
; Default Value: 0
;process_control_timeout = 0




; The maximum number of processes FPM will fork. This has been design to control
; the global number of processes when using dynamic PM within a lot of pools.
; Use it with caution.
; Note: A value of 0 indicates no limit
; Default Value: 0
; process.max = 128




; Specify the nice(2) priority to apply to the master process (only if set)
; The value can vary from -19 (highest priority) to 20 (lower priority)
; Note: - It will only work if the FPM master process is launched as root
;       - The pool process will inherit the master process priority
;         unless it specified otherwise
; Default Value: no set
; process.priority = -19




; Send FPM to background. Set to 'no' to keep FPM in foreground for debugging.
; Default Value: yes
;daemonize = yes
 
; Set open file descriptor rlimit for the master process.
; Default Value: system defined value
;rlimit_files = 1024
 
; Set max core size rlimit for the master process.
; Possible Values: 'unlimited' or an integer greater or equal to 0
; Default Value: system defined value
;rlimit_core = 0




; Specify the event mechanism FPM will use. The following is available:
; - select     (any POSIX os)
; - poll       (any POSIX os)
; - epoll      (linux >= 2.5.44)
; - kqueue     (FreeBSD >= 4.1, OpenBSD >= 2.9, NetBSD >= 2.0)
; - /dev/poll  (Solaris >= 7)
; - port       (Solaris >= 10)
; Default Value: not set (auto detection)
;events.mechanism = epoll




; When FPM is build with systemd integration, specify the interval,
; in second, between health report notification to systemd.
; Set to 0 to disable.
; Available Units: s(econds), m(inutes), h(ours)
; Default Unit: seconds
; Default value: 10
;systemd_interval = 10




;;;;;;;;;;;;;;;;;;;;
; Pool Definitions ; 
;;;;;;;;;;;;;;;;;;;;




; Multiple pools of child processes may be started with different listening
; ports and different management options.  The name of the pool will be
; used in logs and stats. There is no limitation on the number of pools which
; FPM can handle. Your system will tell you anyway :)




; To configure the pools it is recommended to have one .conf file per
; pool in the following directory:
include=/etc/php5/fpm/pool.d/*.conf