It’s not Apache server, it is Nginx. Hence you need some manual configuration. Follow these steps:
– goto HMWP start tab click Nginx configuration button or else goto this URL http://test.doctorcare.com.tw/wp-admin/options-general.php?page=hide_my_wp&nginx_config=1
– add the rules shown in Nginx configuration box to your Nginx configuration file. It’s usually located in /etc/nginx/nginx.conf or /etc/nginx/conf/nginx.conf.
For more detail refer to ‘Nginx configuration’ section in the documentation provided along with the plugin.