No playback in Wavelab Pro 10

Good day! I have been using Wavelab 10 for a few years now, and recently, when I open an audio file, I cannot play it. I have made no changes to the Audio Connections or Global settings.
I tried all of the available Audio Devices. I have tried this with multiple audio files. The cursor does not move.
I do not receive an error message, and the program is locked for about 2 seconds each time I try to play.
Any suggestions on what to try?

Windows or Mac? What audio device do you use?