Everybody know, Apache server is most popular server type because its simple and it was supported by a very motivate community. But, there is another web server type that has better efficiency and quite stable – NGINX. If you haven’t used this type before, you should give it a try and you will be amazed. If we run a WordPress site on NGINX, sometimes we can’t get rid of 404 error when we have selected Custom permalink option. Here is the method to fix WordPress 404 error on NGINX server.