Wordpress Multisite: Subsite wp-admin “err_too_many_redirects”

Question

i installed a new WordPress 4.1 multisite

I can navegate Front and access to the main site dashboard

http://blog.urlcorrect.com/wp-admin/

Answer 1

In my case I was using Nginx,

That means .htaccess won't work, because it's Apache.

If you're using Nginx, you might want to read the Nginx page of the WordPress Codex: https://codex.wordpress.org/Nginx

I'll paste the most importants parts here, in case the Codex go offline for whatever reason:

WordPress Multisite Subdirectory rules

# WordPress multisite subdirectory rules.
# Designed to be included in any server {} block.

map $uri $blogname{
    ~^(?P/[^/]+/)files/(.*)       $blogpath ;
}

map $blogname $blogid{
    default -999;

    #Ref: http://wordpress.org/extend/plugins/nginx-helper/
    #include /var/www/wordpress/wp-content/plugins/nginx-helper/map.conf ;
}

server {
    server_name example.com ;

    root /var/www/example.com/htdocs;
    index index.php;

    location ~ ^(/[^/]+/)?files/(.+) {
        try_files /wp-content/blogs.dir/$blogid/files/$2 /wp-includes/ms-files.php?file=$2 ;
        access_log off;     log_not_found off; expires max;
    }

    #avoid php readfile()
    location ^~ /blogs.dir {
        internal;
        alias /var/www/example.com/htdocs/wp-content/blogs.dir ;
        access_log off;     log_not_found off; expires max;
    }

    if (!-e $request_filename) {
        # Don't use `$uri` here, see https://github.com/yandex/gixy/issues/77
        rewrite /wp-admin$ $scheme://$host$request_uri/ permanent;
        rewrite ^(/[^/]+)?(/wp-.*) $2 last;
        rewrite ^(/[^/]+)?(/.*\.php) $2 last;
    }

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

    location ~ \.php$ {
        try_files $uri =404;
        include fastcgi_params;
        fastcgi_pass php;
    }

    #add some rules for static content expiry-headers here
}

WordPress Multisite subdomains rules

map $http_host $blogid {
    default       -999;

    #Ref: http://wordpress.org/extend/plugins/nginx-helper/
    #include /var/www/wordpress/wp-content/plugins/nginx-helper/map.conf ;

}

server {
    server_name example.com *.example.com ;

    root /var/www/example.com/htdocs;
    index index.php;

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

    location ~ \.php$ {
        try_files $uri =404;
        include fastcgi_params;
        fastcgi_pass php;
    }

    #WPMU Files
        location ~ ^/files/(.*)$ {
                try_files /wp-content/blogs.dir/$blogid/$uri /wp-includes/ms-files.php?file=$1 ;
                access_log off; log_not_found off;      expires max;
        }

    #WPMU x-sendfile to avoid php readfile()
    location ^~ /blogs.dir {
        internal;
        alias /var/www/example.com/htdocs/wp-content/blogs.dir;
        access_log off;     log_not_found off;      expires max;
    }

    #add some rules for static content expiry-headers here
}

Note: WordPress Network installs no longer need the blogs.dir rules when creating a network, however may still be needed when migrating older installations.