TypeError: Cannot read properties of undefined (reading 'key')     at Xo

I don't know why this happens.

TypeError: Cannot read properties of undefined (reading 'key')
    at Xo (6bd6cb3.js:2:54688)
    at 6bd6cb3.js:2:69597
    at A (6bd6cb3.js:2:69759)
    at 6bd6cb3.js:2:69284
    at A (6bd6cb3.js:2:69759)
    at 6bd6cb3.js:2:69284
    at A (6bd6cb3.js:2:69759)
    at 6bd6cb3.js:2:69284
    at A (6bd6cb3.js:2:69759)
    at 6bd6cb3.js:2:69284