Disqus - Error code

When you preview your site and click on the blog title, you may see this message:  "This page could not be reached by Disqus. If you are testing locally or on a password-protected page, please use the disqus_developer parameter as detailed here.." 

Please don't worry about that.  You just need to update your site and you will see the comment box working on your published site.

Instructions are also available on the Disqus Blog.