404 with Minified Files

I’m having trouble getting the minify functionality to work properly. It appears the files are never created (hence the 404) but the plugin is successfully able to write to the file system (with a log file for example) if I hit the minify.php directly through the browser.

I suspect has something to do with my setup. I’m running PHP FPM and Apache Event MPM. I was hoping to avoid using .htaccess files and have switched this off. As a result I’ve placed the rewrite rules directly in the Apache Virtual Host file as per the W3TC install instructions.

The URLs are successfully written out on the page e.g.

http://{website}/wp-content/cache/minify/000000/84a1f/default.include.82a409.css

but result in a 404. If I navigate to the directory on the server it has only default.include.css.id inside.

If I switch off the rewrite in the minify setup I receive a 400 error. I don’t want to run it like this but it makes me think that this 400 error is the underlying reason W3TC can’t create the files it needs.

Any help greatly appreciated.

https://wordpress.org/plugins/w3-total-cache/