PPS Not Showing on Page

Actually, I do see the PowerPoint…

Try clearing your cache and/or a different browser to confirm. You can also try logging out of any Google accounts, and if desired logging back in. Usually a corrupt or conflicting Google cookie is at root with this issue.

Glad the plugin has been useful to you!

I tried in Firefox and Chrome and both worked fine, so I wonder how you fared with the rest of my suggestion. If you don’t want to faff with any cookies, try loading your page again using the “private” or “incognito” mode to test the point.

I did notice something interesting when loading it in IE that might give you a path to pursue if the above fails. Your page reroutes to an HTTPS version even if you specify HTTP. However, multiple resources (especially javascript files) on the page are still hardcoded to insecure versions. There are multiple errors in the console log in all browsers, even on pages where the viewer is working. My theory, specifically, is that you may be running into a browser restriction where the mixed-content nature of the page is pushing IE (and possibly FF in some circumstances) to block the viewer on disallow-frame (X-Frame-Options header) grounds.