Invalid length Error in payment

Developers Transaction Metadata
1

I have created new wallet in Nami and Creating a payment using cardano-serialization-lib-asmjs package function its throwing me error Invalid length

Here is my code

       setpayLoad(true);
      let amount = paymentData.request_amount * 1000000;
      const txBuilder = await initTransactionBuilder();
    const shelleyOutputAddress = Address.from_bech32(
        paymentData.receiving_address
      );
      const shelleyChangeAddress = Address.from_bech32(changeaddress.current);

      txBuilder.add_output(
        TransactionOutput.new(
          shelleyOutputAddress,
          Value.new(BigNum.from_str(amount.toString()))
        )
      );
      const txUnspentOutputs = await getTxUnspentOutputs();
      txBuilder.add_inputs_from(txUnspentOutputs, 1);
    
      // calculate the min fee required and send any change to an address
      txBuilder.add_change_if_needed(shelleyChangeAddress);
      // once the transaction is ready, we build it to get the tx body without witnesses
      const txBody = txBuilder.build();
    
      // Tx witness
      const transactionWitnessSet = TransactionWitnessSet.new();

      const tx = Transaction.new(
        txBody,
        TransactionWitnessSet.from_bytes(transactionWitnessSet.to_bytes())
      );

      let txVkeyWitnesses = await API.current.signTx(Buffer.from(tx.to_bytes(), "utf8").toString("hex"),
        true
      );
 

      txVkeyWitnesses = TransactionWitnessSet.from_bytes(
        Buffer.from(txVkeyWitnesses, "hex")
      );

      transactionWitnessSet.set_vkeys(txVkeyWitnesses.vkeys());

      const signedTx = Transaction.new(tx.body(), transactionWitnessSet);
  
      const submittedTxHash = await API.current.submitTx(
        Buffer.from(signedTx.to_bytes(), "utf8").toString("hex")
      );

   console.log(submittedTxHash);