Rise 360 - Media Could Not Be Loadedeither because the server or network failed or because the format is not supported

I'm having this same issue. I've had video files in use in 4 separate Rise Review files for over a year that have worked with no issue, and now I'm getting the same playback error "The media could not be loaded, either because the server or network failed or because the format is not supported." One of the courses I re-encoded the video to an even lower bit rate to make the file size smaller, reloaded and the Review link now works, but doing the same for others is not fixing the issue. No clue why they've worked fine for a year and now are no longer working.