Our external partners have shared this Articulate link and said:
Within Rise there is a feature that fixes the issue, please may suggest using the Reset Learners Progress option within Rise before you export the revised course. This will prevent the blank page from being seen and it will not reset any quiz data.
Vist this link to learn more : https://community.articulate.com/series/rise-360/articles/rise-360-share-content-with-learners#lms-reset:~:text=indexapi.html.-,Note%3A,-If%20you%20delete
I hope this info is of help, I'll test it when I next update a Rise course.Sue