JAMMMING - Undefined Map eror

I’ve been at this for ages now. I Cant work out why I’m receiving this error?

TrackList.js:10 Uncaught TypeError: Cannot read properties of undefined (reading 'map')
    at TrackList.render (TrackList.js:10:1)
    at finishClassComponent (react-dom.development.js:17485:1)
    at updateClassComponent (react-dom.development.js:17435:1)
    at beginWork (react-dom.development.js:19073:1)
    at HTMLUnknownElement.callCallback (react-dom.development.js:3945:1)
    at Object.invokeGuardedCallbackDev (react-dom.development.js:3994:1)
    at invokeGuardedCallback (react-dom.development.js:4056:1)
    at beginWork$1 (react-dom.development.js:23964:1)
    at performUnitOfWork (react-dom.development.js:22776:1)
    at workLoopSync (react-dom.development.js:22707:1)

I have looked at other potentially solutions and they say to remove the trackList component from the playlist.js file, which I tried and still receive the error. Can anyone suggest something?


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