I found a forum post which was helpful.
I went to the powerpress settings, Media Appearance, and changed the "Having Problems" to "Yes, please try to fix". That helped the problem.
I then followed another post's advice to turn off plugins one by one until you find a plugin that restores the player. None of the plugins was the problem.
The problem is a theme conflict with TISA from Themify.
Any tips on how to troubleshoot the theme confilct?
It would be helpful if there was a sticky post with known theme and plugin conflicts along with version numbers. But I know that's a pain to manage.