Got an error: Uncaught Error: Unsupported operation: Platform._version

main.dart

import 'dart:convert';
import 'dart:io';

void main() async {
  final parsedUri =
      Uri.parse('https://run.mocky.io/v3/ff312e74-ac17-49ee-9ce3-8638d7329917');
  // DartPad error will be occured!
  final myAccountRequest = await HttpClient().getUrl(parsedUri);
  final myAccountResponse = await myAccountRequest.close();
  final myAccountJsonString = await utf8.decodeStream(myAccountResponse);
  final myAccount = jsonDecode(myAccountJsonString);
  // display foobar
  print(myAccount['username']);
}