account.sign(transaction) throws error 'Require one or multiple privateKeys to sign'

[dashameter]

Expected Behavior

Will find the privateKey from keychain for you and sign a transaction e.g. when the tx looses its signatures by adding OP_RETURN data using transaction.addData('correct horse battery staple') . via https://dashevo.github.io/wallet-lib/#/account/sign

Current Behavior

throws error:

Something went wrong: Error: Require one or multiple privateKeys to sign
    at KeyChain.sign (node_modules/@dashevo/wallet-lib/src/types/KeyChain/methods/sign.js:13:27)
    at Account.sign (node_modules/@dashevo/wallet-lib/src/types/Account/methods/sign.js:8:24)
    at sendFunds (sendFunds.js:21:39)
    at process._tickCallback (internal/process/next_tick.js:68:7)

Steps to Reproduce (for bugs)

Run example code:
https://gist.github.com/dashameter/fce17bad0d97ab644d0cff0acb98cbcc

[dashameter]

Another context where account.sign() throws the same error instead of looking up the private keys for signing:

const UTXO = DAPIclient.getUTXO(address)
const transaction = account.createTransaction({
        recipient,
        satoshis,
        utxos: UTXO.items,
})

const signedTx = account.sign(transaction); // Will find the privateKey from keychain for you.

[Alex-Werner]

Closing this issue as #188 should have fixed this already.

Do not hesitate to re-open if you find a similar issue.

Thanks,