Total Cache JS/CSS combination CDN creates 400 status codes

I’ve combined CSS into one main file. I also combined as much JS into one file as I could. I also have a CDN enabled.

What I’ve noticed that the files it creates are linked to the CDN, but show 400 status codes. https://popdust.presscdn.com/wp-content/w3tc/min/8ee658/default.include.451671658.css for example.

URL: https://staging.popdust.com/2011/03/16/enrique-iglesias-x-factor-host-rumor/

Are these w3tc generated files supposed to be omitted from the CDN? Or is the reason they are not found due to the fact that I am not using the production URL?