Custom 404 (page_not_found) Not Working

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Hey guys,

Followed this tutorial to a "T":http://c5cookbook.com/recipes/customize_404_page...

It used to work fine, but since upgrading to 5.6.0.1, I now get my view.php rendering instead of my single_pages/page_not_found.php

I notice I have page_not_found.php in my themes/theme_name/page_not_found.php as well, and it has been added via the Themes > Inspect in Dashboard. Could this be causing a problem?

Thanks

 
benradler replied on at Permalink Reply
Any idea on this? Still can't resolve it.