I try build a form using Flutter, I have my own StatefulWidget that return a Form with 2 Input (I try with TextField too) and a DropdownButton.

When I executed the second Input show this error: 'Missing Focus scope.'

The code:

import 'package:flutter/material.dart';

class ContactFormView extends StatefulWidget {

  @override
  CreateFormViewState createState() => new CreateFormViewState();

}

class CreateFormViewState extends State<ContactFormView> {

  GlobalKey<FormState> _formKey = new GlobalKey<FormState>();

  @override
  Widget build(BuildContext context) {
    return new Scaffold(
      body: new Form(
          key: _formKey,
          child: new Column(
              children: <Widget>[
                new Input(
                    labelText: 'First Name',
                    onChanged: (InputValue value) {
                      // Logic here
                    }
                ),
                new Input(
                    labelText: 'Last Name',
                    onChanged: (InputValue value) {
                      // Logic here
                    }
                ),
                new RaisedButton(
                    child: new Text('SUBMIT'),
                    onPressed: () {
                      // Logic here
                    },
                )
              ]
          )
      )
    );
  }

}