uncaught exception: bitcore.ErrorInvalidArgument: Invalid Argument: Must provide an object from where to extract data

[FreeTrade]

I've been trying some of the suggested examples - but getting this bitcore error -

const privateKey = (wif format);
datacash.send({
data: ["0x6d02", "Hello from datacash"],
cash: { key: privateKey }
});

uncaught exception: bitcore.ErrorInvalidArgument: Invalid Argument: Must provide an object from where to extract data

[Wadis10]

I'm getting the same error

[FreeTrade]

Looks like it needs the format

WIF Compressed (base58)

[Sidhesh009]

Im getting same issue. give me solution of this.