CSS Issue?

Having issues similar to this topic: https://www.fakku.net/viewtopic.php?t=70120

http://cdn.fakku.net/8041E1/t/css/header.css doesn't load.

Same issue with the Little White Butterflies site.

Not sure quite what to do about it to fix it though.

First time this has happened and quite frustrating. Any help would be appreciated.

Clean cache.

Resetting my router fixed it