We'll create fresh WordPress site with Loft404 installed. You have 20 minutes to test the plugin after that site we'll be deleted.
Loft404 is a small plugin to help redirect the default 404 page to a custom page. You can choose to enable it, then set the custom 404 page.
PS: The plugin does not create a custom 404 page for your site. You need to create a page and add content to it. By working with our another WP plugin LoftBuilder, you can easily create a beautiful page in minutes.