No sound during playback

I’m using Audacity 3.2.4 and Windows 10. I’ve been able to record sound for a while, but I can’t hear it anymore. All speakers are switched on and everything is ok in the settings. I reinstalled Audacity twice. But unfortunately I hear no sound during playback. Can someone help me and give me a tip? Thanks for every answer.
Best regards

Under Audio Setup, what is your Playback Device ?

Also, check that you have not inadvertently turned down your playback volume level slider on the Meter/Mixer Toolbar: