nginx: [emerg] the "ssl" parameter requires ngx_http_ssl_module in /usr/local/nginx/conf/examp le.conf:4

This error message indicates that the ngx_http_ssl_module is not enabled in the nginx configuration file. The "ssl" parameter is used to configure SSL/TLS encryption for HTTPS connections, and it requires this module to be loaded.

To resolve this issue, you need to enable the ngx_http_ssl_module in your nginx configuration file. Here's how to do it:

1. Open the nginx configuration file in a text editor. The file is usually located at /etc/nginx/nginx.conf or /usr/local/nginx/conf/nginx.conf.

2. Look for the "http" block in the configuration file. If there is no such block, create one.

3. Inside the "http" block, add the following line to enable the ngx_http_ssl_module:

    http {
        ...
        # Enable SSL/TLS encryption
        ssl on;
        ...
    }

4. Save the configuration file and restart nginx for the changes to take effect:

    sudo service nginx restart

After enabling the ngx_http_ssl_module, you should be able to use the "ssl" parameter in your nginx configuration file without getting the "requires ngx_http_ssl_module" error.