Rise Export to Web Not Working

I have a number of courses that are built in Rise. 

Each of these courses holds various types of multimedia content.

Previously I was using the web export option because I do not need to track completion for these courses. I am loading them into a Thinkific LMS. 

The workflow of exporting to web and then uploading the zip file to Thinkific has worked for years. 

It is now no longer working for any of the courses that I have published. 

Has something changed in the export to web process that makes these files no longer readable by an LMS like Thinkific?