The Office macro fails to load the Word or Excel documents on a blog post

Issue Summary

The Office macro fails to load the Word or Excel documents on a blog post

Steps to Reproduce

1. Attach some Word or Excel documents to a blog post
2. Use the Office macro to load any of these documents on the same blog post

Expected Results

The Office documents content can be viewed on the blog post.

Notes: The documents can be displayed on Confluence 7.4

Actual Results

An error message shown on the blog post for each Office macro:

"We can't preview this file. You'll have to download the file to view it."

A "Failed to load resource: the server responded with a status of 500 ()" error is displayed in the browser console

Workaround

Currently there is no known workaround for this behavior. A workaround will be added here when available