flutterwave standard

[nebotaismael]

{status: error, success: false, transaction_id: null, tx_ref: c4cfb400-acac-1e50-9d64-cd7f6ea96a6b}
returns me that error when using the package on flutter

// ignore_for_file: use_build_context_synchronously

import 'package:flutter/material.dart';
import 'package:flutterwave_standard/flutterwave.dart';
import 'package:uuid/uuid.dart';

payMentAPI(
String amount, BuildContext context, String email, String name) async {
final Customer customer = Customer(email: email, name: name);

final Flutterwave flutterwave = Flutterwave(
context: context,
publicKey: 'key here',
currency: 'XAF',
redirectUrl: 'http://localhost:7357',
txRef: Uuid().v1(),
amount: amount,
customer: customer,
paymentOptions: "card",
customization: Customization(title: "FETech Commerce"),
isTestMode: true);
final ChargeResponse response = await flutterwave.charge();

showLoading(response.toString(), context);
print("${response.toJson()}");
}

Future showLoading(String message, BuildContext context) {
return showDialog(
context: context,
barrierDismissible: true,
builder: (BuildContext context) {
return AlertDialog(
content: Container(
margin: EdgeInsets.fromLTRB(30, 20, 30, 20),
width: double.infinity,
height: 50,
child: Text(message),
),
);
},
);
}