TypeError: Cannot read property 'replace' of undefined (row 84).

[Obi-Five]

Hi, Sorry but i don't know jawascript so i don't know how to try to fix it by myself. I am trying to read this data and I get the error code present in the subject of the message.

{ "id": 8870, "whitelisted": false, "buys": { "quantity": 21843, "unit_price": 128 }, "sells": { "quantity": 45074, "unit_price": 166 } }

Thanks for the support!