Craft not loading custom 404 template for errors Whenever I hit a non-existent page on a dev site, I only get Craft's native 404 page, not the one I have at /craft/templates/404.html. The site has no routes. Any ideas why this might be?
Turns out the general.php file had the following line (docs) in it:

'errorTemplatePrefix' =&gt; "_errors/"


Once I'd created the proper folder and files, all worked as expected.

Thanks, @CraftCMS Twitter person!