Missing field in symfony 3 form with fosuserbundle - php

Question

I am using Symfony 3 to create a web-application. I am using FOSUserBundle. I want user to register theirself, so I wrote a custom template and RegistrationFormType. My problem is, that the fiel "email" is not filled correctly in the controller. Every submit I get following error: https://ibb.co/cYkp8y
I am using the default controller from FOSUserBundle.
My template:
{{ form_start(form, {'method': 'post', 'action': path('fos_user_registration_register'), 'attr': {'class': 'form-group'}}) }}
<fieldset>
<div class="form-group">
{{ form_widget(form.forename, {'attr': {'class': 'form-control col-md-7 col-xs-12', 'placeholder': 'Vorname'}}) }}
</div>
<div class="form-group">
{{ form_widget(form.surname, {'attr': {'class': 'form-control col-md-7 col-xs-12', 'placeholder': 'Nachname'}}) }}
</div>
<div class="form-group">
{{ form_widget(form.email, {'attr': {'class': 'form-control col-md-7 col-xs-12', 'placeholder': 'Email'}}) }}
</div>
<div class="form-group">
{{ form_widget(form.club, {'attr': {'class': 'form-control col-md-7 col-xs-12'}}) }}
</div>
<div class="form-group">
{{ form_widget(form.plainPassword.first, {'attr': {'class': 'form-control col-md-7 col-xs-12', 'placeholder': 'Passwort'}}) }}
</div>
<div class="form-group">
{{ form_widget(form.plainPassword.second, {'attr': {'class': 'form-control col-md-7 col-xs-12', 'placeholder': 'Passwort wiederholen'}}) }}
</div>
<input class="btn btn-lg btn-success btn-block" type="submit" value="Anmelden">
</fieldset>
{% do form.username.setRendered %}
{{ form_end(form) }}
My RegistrationType:
class RegistrationType extends AbstractType
{
public function buildForm(FormBuilderInterface $builder, array $options)
{
$builder
->add('email', EmailType::class)
->add('plainPassword', LegacyFormHelper::getType('Symfony\Component\Form\Extension\Core\Type\RepeatedType'), array(
'type' => LegacyFormHelper::getType('Symfony\Component\Form\Extension\Core\Type\PasswordType'),
'options' => array('translation_domain' => 'FOSUserBundle'),
'first_options' => array('label' => 'form.password'),
'second_options' => array('label' => 'form.password_confirmation'),
'invalid_message' => 'fos_user.password.mismatch',
))
->add('forename', TextType::class, array(
'label' => 'Vorname',
))
->add('surname', TextType::class, array(
'label' => 'Nachname'
))
->add('club', EntityType::class, array(
'class' => 'AppBundle\Entity\Club',
'multiple' => false,
'expanded' => false,
'label' => 'Vereinszugehörigkeit',
'required' => false,
))
;
}
public function getParent()
{
return 'FOS\UserBundle\Form\Type\RegistrationFormType';
}
public function getBlockPrefix()
{
return 'app_user_registration';
}
}
Does anybody know, why the controller can't handle the email?!