Just put a fresh install of Xenforo 1.4.3 onto my shared hosting server with namecheap. The install went through fine without any issues. As soon as the install finished I went straight to editing templates. The first template I attempted to edit was DEFAULT but when I went to save it, I received an error. Without any luck I went on to attempt to edit the Header template. The header template would save but the header.css would not. Resulting in the same error as shown above. Just wondering whats causing this issue and how I can go about fixing it as I really want to get editing!!