Presenter 10 playback works in HTTP but not HTTPS?

I have a Presenter (v10) presentation that we have been using successfully for a few years.

This week I added HTTPS to our media server. Most of our files display correctly, but this one only shows a white screen with "Adobe Presenter" under four gray squares doing a ZomboCom spin.

In Chrome Inspector Console, the following differences occur in HTTP vs HTTPS:

HTTP displays 4 success messages:

onDOMContentLoaded for http://SERVER/PATH/     content.js:604

onCompleted for http://SERVER/PATH/     content.js:623

Gather controls:     capture_page_info.js:954

Process DOM-change event     content.js:495

HTTPS displays 2 errors:

X GET https://SERVER/PATH/data/html/fa/SourceSansPro-Regular.otf

X Uncaught TypeError: Cannot read property 'length' of undefined     presenter.js:697

Verified repeatably across Win 10 & Mac 10.12.