PowerPoint Live slide/s disappears

I set up a PowerPoint Live presentation for Teams. I used the compression option to save to One Drive.

I tested it and everything worked.

Two days later when I ran the same presentation, once the first slide was shown it disappeared within 10 seconds. No other slides worked and participants could only see a blank presentation screen.

As I hadn't changed anything I rebooted the system and tried again and the issue remained. The PowerPoint Live presentation did not work whereas previously it had.