Problem when Zoom Does Not Find Microphone and Speaker

I had a problem yesterday at a Zoom meeting.  I was using a laptop in the same room as the presenter.  I have done this many times without any problems.  I have a headset with a microphone connected to the laptop.    When I was let in to the meeting, for some unknown reason Zoom did not detect my speaker nor microphone.  (And i did not know that until I was let in to the meeting.)   But the laptop was causing echo in the Zoom meeting.  There was no way that I could mute my session because, as Zoom did not recognize my microphone and speaker/headphones, it did not provide me with a mute icon.  This has never happened before, and it did not happen when I just tested the laptop and headset with another Zoom session.  I have no idea why Zoom did not sense my microphone and headset.  But I consider it a bug that Zoom did not present me with any way to mute.  I had to disconnect from the Zoom session.