Site loading incorrectly after activation

Hi,

I’m currently trying to increase page load times on a site of mine at https://abyssrecordings.com.

As part of this performance optimisation I have improved cache performance and connected my site to load via CDN, however I wanted to go a little further with ‘Autoptimize’.

Since activating the plugin my webpages now load like this:
http://www.screencast.com/users/Vanstone/folders/Default/media/c2036244-45d9-4292-ab19-4bbc91255ba1

Which they never did before, please can you clarify how I can fix this issue so that my pages don’t load the raw html without styling?

Thanks in advance,

Best Regards,
AFX