USB pcp not recognized

I am using MacOS High Sierra 10.13.1 and have downloaded Audacity 3.
Why isn’t it recognizing my plug in USB pcp cassette player? The only option I am getting is for the built in mic. after some troubleshooting I got the error -9997 code.
please help

Is this one of those cheap cassette-to-USB devices that shows up as “USB PnP Audio Device”? If so, you are out of luck: we don’t know of anyone who has got one of those to work on macOS.
– Bill