From looking into this issue I don't believe this is related to Confluence at all, but more a common problem with Google Chrome as described in thsi article: http://www.roezer.com/fixing-chrome-bug-error-324-neterr_empty_response/
Essentially, most people seem to fix this by clearing their cookies and caches so can you give this a go and let us know whether this resolves the issue or not? If that doesn't work you can also try "Incognito mode" because this issue could aslo be being caused by a browser addon that is causing conflicts.
All the best,
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