Blank screen when recording a slideshow

So I've added music to a Keynote presentation to create a slideshow. I've done this dozens of times now in the COVID era, but this time Keynote is acting differently. When I select "Record Slideshow", my screen goes black, and the only controls for recording are now in the TouchBar of my MacBook Pro. Naturally, these are WAY too small to see well enough to make sure my slides change at the proper time during the music. I've changed no settings, nor have I updated Keynote (that I'm aware of). I've even noticed that when trying to play it back without music, I get a blank screen and slides only visible on the TouchBar. The presentation that I'm working on was originally made in Keynote for iPad and then sent to my MacBook Pro. Could that have anything to do with it? What am I missing?