htaccess to nginx conversion - Error [emerg] invalid variable name

I want to do htaccess to nginx conversion of the following code, i used following auto formatter to do the translation however i get a error as below, i dont know why and how to fix this issue. can you please help Url i used to convert [login to view URL] Error i get Invalid nginx configuration: nginx: [emerg] invalid variable name in /var/www/vhosts/system/[login to view URL]:12 nginx: configuration file /etc/nginx/[login to view URL] test failed .htacess code ModPagespeed on Options -indexes AddOutputFilterByType DEFLATE text/html text/plain text/xml # BEGIN Rewrite <IfModule mod_rewrite.c> RewriteEngine on RewriteBase / RewriteCond %{HTTP_HOST} ^[login to view URL] RewriteRule (.*) [login to view URL]$1 [R=301,L] RewriteCond %{THE_REQUEST} \s/+(?:index\.php)?\?search=([^\s&]+) [NC] RewriteRule ^ /%1/? [R=302,L,NE] ## replace of space with - # executes **repeatedly** as long as there are more than 1 spaces in URI RewriteRule "^(\S*) +(\S* .*)$" /$1-$2 [L,NE] # executes when there is exactly 1 space in URI RewriteRule "^(\S*) (\S*)$" /$1-$2? [L,R=302,NE] RewriteRule ^search/([^/]+)/page/([^/]+)$ [login to view URL]$1&page=$2 RewriteRule ^ads/css/([^/]+)$ ads/css/$1 RewriteRule ^ads/images/([^/]+)$ ads/images/$1 [QSA,L] RewriteRule ^adwords/admin/([^/]+)$ adwords/admin/$1 [L] RewriteRule ^adwords/([^/]+)$ adwords/$1 [L] RewriteRule ^images/([^/]+)$ images/$1 [QSA,L] RewriteRule ^images/([^/]+)/([^/]+)$ images/$1/$2 [QSA,L] RewriteRule ^ajax/([^/]+)$ ajax/$1 [QSA,L] RewriteRule ^info/([^/]+)$ info/$1 [QSA,L] RewriteRule ^css/([^/]+)$ css/$1 [QSA,L] RewriteRule ^css/([^/]+)/([^/]+)$ css/$1/$2 [QSA,L] RewriteRule ^includes/([^/]+)$ includes/$1 [QSA,L] RewriteRule ^includes/([^/]+)/([^/]+)$ includes/$1/$2 [QSA,L] # if a directory or a file exists, use it directly RewriteCond %{REQUEST_FILENAME} !-f RewriteCond %{REQUEST_FILENAME} !-d RewriteRule ^([^/]+)/?$ ?search=$1 [QSA,L] </IfModule> # END Rewrite nginx code when i converted the values using above link is if ($http_host ~ "^[login to view URL]"){ set $rule_0 1$rule_0; } if ($rule_0 = "1"){ rewrite /(.*) [login to view URL]$1 permanent; } #ignored: condition 0 if ($rule_1 = "1"){ rewrite ^/ /$bref_1/? redirect; } rewrite /"^(S*) /+(S*; rewrite /"^(S*) /(S*)$"; rewrite ^/search/([^/]+)/page/([^/]+)$ /[login to view URL]$1&page=$2; rewrite ^/ads/css/([^/]+)$ /ads/css/$1; rewrite ^/ads/images/([^/]+)$ /ads/images/$1 last; rewrite ^/adwords/admin/([^/]+)$ /adwords/admin/$1 last; rewrite ^/adwords/([^/]+)$ /adwords/$1 last; rewrite ^/images/([^/]+)$ /images/$1 last; rewrite ^/images/([^/]+)/([^/]+)$ /images/$1/$2 last; rewrite ^/ajax/([^/]+)$ /ajax/$1 last; rewrite ^/info/([^/]+)$ /info/$1 last; rewrite ^/css/([^/]+)$ /css/$1 last; rewrite ^/css/([^/]+)/([^/]+)$ /css/$1/$2 last; rewrite ^/includes/([^/]+)$ /includes/$1 last; rewrite ^/includes/([^/]+)/([^/]+)$ /includes/$1/$2 last; if (!-f $request_filename){ set $rule_17 1$rule_17; } if (!-d $request_filename){ set $rule_17 2$rule_17; } if ($rule_17 = "21"){ rewrite ^/([^/]+)/?$ /?search=$1 last; }