WHMCS nGINX rules for SSL / Non SSL

hostname.conf

### NON SSL | STANDARD HTTP
server {
    listen 80;
    server_name domain.com;
    root  /path/to/whmcs;
    index index.php index.html;
    access_log  /var/log/nginx/domain.com.log combined;
    access_log  /var/log/nginx/domain.com.bytes bytes;
    error_log   /var/log/nginx/domain.com.error.log error;
    location / {
        try_files $uri $uri/ /index.php?$query_string;
        location ~* ^.+\.(jpeg|jpg|png|gif|bmp|ico|svg|css|js)$ {
            expires     max;
        }

        location ~ [^/]\.php(/|$) {
            fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
            if (!-f $document_root$fastcgi_script_name) {
                return  404;
            }

            fastcgi_pass    unix:/path/to/php-fpm.sock;
            fastcgi_index   index.php;
            include         /etc/nginx/fastcgi_params;
        }
    }

    location ~ /announcements/?(.*)$ {
        rewrite ^/(.*)$ /index.php?rp=/announcements/$1;
    }
      
    location ~ /downloads/?(.*)$ {
        rewrite ^/(.*)$ /index.php?rp=/downloads/$1;
    }
    
    location ~ /knowledgebase/?(.*)$ {
        rewrite ^/(.*)$ /index.php?rp=/knowledgebase/$1;
    }

    error_page  403 /error/404.html;
    error_page  404 /error/404.html;
    error_page  500 502 503 504 /error/50x.html;

    location ~* "/\.(htaccess|htpasswd)$" {
        deny    all;
        return  404;
    }
}
###
### SSL | SECURE HTTPS
server {
    listen 443
    server_name domain.com;
    root  /path/to/whmcs;
    index index.php index.html;
    access_log  /var/log/nginx/domain.com.log combined;
    access_log  /var/log/nginx/domain.com.bytes bytes;
    error_log   /var/log/nginx/domain.com.error.log error;

    ssl         on;
    ssl_certificate      /path/to/ssl.pem;
    ssl_certificate_key  /path/to/ssl.key;
    
    location / {
        try_files $uri $uri/ /index.php?$query_string;
        location ~* ^.+\.(jpeg|jpg|png|gif|bmp|ico|svg|css|js)$ {
            expires     max;
        }

        location ~ [^/]\.php(/|$) {
            fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
            if (!-f $document_root$fastcgi_script_name) {
                return  404;
            }
            fastcgi_pass    unix:/path/to/php-fpm.sock;     
            fastcgi_index   index.php;
            include         /etc/nginx/fastcgi_params;
              fastcgi_read_timeout 30;
        }
    }

    location ~ /announcements/?(.*)$ {
        rewrite ^/(.*)$ /index.php?rp=/announcements/$1;
    }
      
    location ~ /downloads/?(.*)$ {
        rewrite ^/(.*)$ /index.php?rp=/downloads/$1;
    }
    
    location ~ /knowledgebase/?(.*)$ {
        rewrite ^/(.*)$ /index.php?rp=/knowledgebase/$1;
    }
    
    error_page  403 /error/404.html;
    error_page  404 /error/404.html;
    error_page  500 502 503 504 /error/50x.html;

    location ~* "/\.(htaccess|htpasswd)$" {
        deny    all;
        return  404;
    }
}
###

Thanks.
A semicolon is missing at the end of line 52.

Hi. updated whmcs rules: https://hostup.org/blog/whmcs-friendly-urls-configuration-for-nginx/