PHP предлагает файл index.php от Roudcube для скачивания

Я установил Roundcube свежим на Debian с Nginx, и он отлично работает на IP-адресе с /webmail или domain/webmail. Но когда я попытался запустить его в корне домена, php предлагает файл PHP для загрузки. Как я могу получить доступ к нему в корне домена?

Это моя конфигурация Nginx, которая не будет работать, и я получаю файл PHP как загрузку.

server {
        listen *:80;

        listen *:443 ssl;
        ssl_protocols TLSv1 TLSv1.1 TLSv1.2;
        ssl_certificate /var/www/clients/client0/web1/ssl/xxxxl.de.crt;
        ssl_certificate_key /var/www/clients/client0/web1/ssl/xxxx.de.key;

        server_name xxx.de ;
        root /usr/share/roundcube;

        index index.html index.htm index.php index.cgi index.pl index.xhtml;


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

           location ~ ^/(bin|SQL|config|temp|logs)/ {
              deny all;
           }

   location ~* \.php$ {
                        fastcgi_param  QUERY_STRING            $query_string;
                       fastcgi_param   REQUEST_METHOD          $request_method;
                       fastcgi_param   CONTENT_TYPE            $content_type;
                       fastcgi_param   CONTENT_LENGTH          $content_length;

                       fastcgi_param   SCRIPT_FILENAME         $request_filename;
                       fastcgi_param   SCRIPT_NAME             $fastcgi_script_name;
                       fastcgi_param   REQUEST_URI             $request_uri;
                       fastcgi_param   DOCUMENT_URI            $document_uri;
                       fastcgi_param   DOCUMENT_ROOT           $document_root;
                       fastcgi_param   SERVER_PROTOCOL         $server_protocol;

                       fastcgi_param   GATEWAY_INTERFACE       CGI/1.1;
                       fastcgi_param   SERVER_SOFTWARE         nginx/$nginx_version;

                       fastcgi_param   REMOTE_ADDR             $remote_addr;
                       fastcgi_param   REMOTE_PORT             $remote_port;
                       fastcgi_param   SERVER_ADDR             $server_addr;
                       fastcgi_param   SERVER_PORT             $server_port;
                       fastcgi_param   SERVER_NAME             $server_name;

                       fastcgi_param   HTTPS                   $https;

                       # PHP only, required if PHP was built with --enable-force-cgi-redirect
                       fastcgi_param   REDIRECT_STATUS         200;
                       # To access SquirrelMail, the default user (like www-data on Debian/Ubuntu) must be used
                       fastcgi_pass unix:/var/lib/php7.0-fpm/apps.sock;
                       fastcgi_index index.php;
                       fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
                       fastcgi_buffer_size 128k;
                       fastcgi_buffers 256 4k;
                       fastcgi_busy_buffers_size 256k;
                       fastcgi_temp_file_write_size 256k;
   }

}

Но если я поставлю int в каталог (изменю корень на /usr/share/ и добавлю код ниже), я получу доступ к Roundcube.

location /{
               location ~ ^/roundcube/(.+\.php)$ {
                       try_files $uri =404;
                       root /usr/share/;
                       fastcgi_param   QUERY_STRING            $query_string;
                       fastcgi_param   REQUEST_METHOD          $request_method;
                       fastcgi_param   CONTENT_TYPE            $content_type;
                       fastcgi_param   CONTENT_LENGTH          $content_length;

                       fastcgi_param   SCRIPT_FILENAME         $request_filename;
                       fastcgi_param   SCRIPT_NAME             $fastcgi_script_name;
                       fastcgi_param   REQUEST_URI             $request_uri;
                       fastcgi_param   DOCUMENT_URI            $document_uri;
                       fastcgi_param   DOCUMENT_ROOT           $document_root;
                       fastcgi_param   SERVER_PROTOCOL         $server_protocol;

                       fastcgi_param   GATEWAY_INTERFACE       CGI/1.1;
                       fastcgi_param   SERVER_SOFTWARE         nginx/$nginx_version;

                       fastcgi_param   REMOTE_ADDR             $remote_addr;
                       fastcgi_param   REMOTE_PORT             $remote_port;
                       fastcgi_param   SERVER_ADDR             $server_addr;
                       fastcgi_param   SERVER_PORT             $server_port;
                       fastcgi_param   SERVER_NAME             $server_name;

                       fastcgi_param   HTTPS                   $https;

                       # PHP only, required if PHP was built with --enable-force-cgi-redirect
                       fastcgi_param   REDIRECT_STATUS         200;
                       # To access SquirrelMail, the default user (like www-data on Debian/Ubuntu) must be used
                       #fastcgi_pass 127.0.0.1:9000;
                       fastcgi_pass unix:/var/lib/php7.0-fpm/apps.sock;
                       fastcgi_index index.php;
                       fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
                       fastcgi_buffer_size 128k;
                       fastcgi_buffers 256 4k;
                       fastcgi_busy_buffers_size 256k;
                       fastcgi_temp_file_write_size 256k;
               }
               }
    ```

How can i access Roundcube directly from the root of the TLD?