sorry to hear you are having issues, could you post a link to where you are seeing the issue, it all renders fine on my pc
If that helps, console says it failed to load the following (but gave no reason):
>https://cdn.rawgit.com/google/code-prettify/master/loader/ru...
>https://cdn.rawgit.com/google/code-prettify/master/loader/la...
Maybe it's some cross-site loading being blocked, I dunno.