Erreur au niveau de twig

{% extends 'SocieteBundle:base:home.html.twig' %}
{% block content %}

{{ form_start(form, {'method': 'POST'} , { 'attr': {'class': 'login100-form'} }) }}
   <div class="main-panel">
			<div class="content">
				<div class="page-inner">
					<h4 class="page-title">Ajouter un employé</h4>
					<div class="row">
						<div class="col-md-11">
							<div class="card card-with-nav">
								<div class="card-header">
									<div class="row row-nav-line">
										<ul class="nav nav-tabs nav-line nav-color-secondary" role="tablist">	
										</ul>
									</div>
								</div>
								<div class="card-body">
									<div class="row mt-3">
										<div class="col-md-6">
											<div class="form-group form-group-default">
												<label>Name</label>
												<input type="text" class="form-control"  placeholder="Name" {{ form_widget(form.nom) }}
											</div>
										</div>
										<div class="col-md-6">
											<div class="form-group form-group-default">
												<label>Prenom</label>
												<input type="text" class="form-control"  placeholder="Prenom" {{ form_widget(form.prenom) }}
											</div>
										</div>
									</div>
									<div class="row mt-3">
										<div class="col-md-4">
											<div class="form-group form-group-default">
												<label>Email</label>
												<input type="email" class="form-control"  placeholder="example@gmail.com" {{ form_widget(form.email) }}
											</div>
										</div>
										<div class="col-md-4">
											<div class="form-group form-group-default">
												<label>Mot de Passe</label>
												<input type="password" class="form-control" name="password">
											</div>
										</div>
										<div class="col-md-4">
											<div class="form-group form-group-default">
												<label>Confirmer le mot de passe</label>
												<input type="password" class="form-control" >
											</div>
										</div>
									</div>
									<div class="row mt-3">
										<div class="col-md-4">
											<div class="form-group form-group-default">
												<label>Cin</label>
												<input type="number" class="form-control"  placeholder="00000000"{{ form_widget(form.cin) }}
											</div>
										</div>
										<div class="col-md-4">
											<div class="form-group form-group-default">
												<label>Telephone</label>
												<input type="number" class="form-control" placeholder="+216..." {{ form_widget(form.telephone) }}
											</div>
										</div>
			
									<div class="row mt-3">
										<div class="col-md-6">
										<div class="form-group form-group-default">
												<label>Sex</label>
												<select class="form-control"  size="1" {{ form_widget(form.sex) }}
												</select>
											</div>	
											
										</div>
										<div class="col-md-6">
										<div class="form-group form-group-default">
												<label>Date naissance</label>
												<input type="date" class="form-control" {{ form_widget(form.naissance) }}
											</div>
										</div>
										
									</div>
									<div class="row mt-3 mb-1">
										<div class="col-md-6">
											<div class="form-group form-group-default">
												<label>Address</label>
											<input type="text" class="form-control" placeholder="ex:Rue...." {{ form_widget(form.adresse) }}
											</div>
										</div>
										<div class="col-md-6">
											<div class="form-group form-group-default">
												<label>Ville</label>
												<input type="text" class="form-control" {{ form_widget(form.ville) }}
											</div>
										</div>
									</div>
									
									<div class="row mt-3">
										<div class="col-md-4">
											<div class="form-group form-group-default">
												<label>Pays</label>
												<input type="text" class="form-control"{{ form_widget(form.pays) }}
											</div>
										</div>
										<div class="col-md-4">
											<div class="form-group form-group-default">
												<label>Salaire</label>
												<input type="number" class="form-control"{{ form_widget(form.salaire) }}
											</div>
										</div>
										<div class="col-md-4">
											<div class="form-group form-group-default">
												<label>responsable RH</label>
												<select class="form-control">
													{% if responsables %}
										   {% for x in responsables %}
										    {% if x.fonction == "Responsable RH"%}
                                            <option >{{ x.email }}</option>
									        {% endif %}
                                            {% endfor %}
											{% endif %}
												</select>
											</div>
										</div>
									</div>
									<div class="text-right mt-3 mb-3">
										<button type="submit" class="btn btn-success"{{ form_widget(form.Enregistrer) }} </button>
										<input type="reset" class="btn btn-danger">
									</div>
								</div>
							</div>
						</div>
					</div>
				</div>
			</div>
			
		</div>
{% endblock %}

<?php
namespace SocieteBundle\Controller;
use SocieteBundle\Form\Modifieremployer;
use SocieteBundle\Form\UserType;
use SocieteBundle\Tests\Controller\DefaultControllerTest;
use Symfony\Bundle\FrameworkBundle\Controller\Controller;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpFoundation\Response;
use Symfony\Component\Security\Core\Encoder\UserPasswordEncoderInterface;
use Symfony\Component\Security\Core\Encoder\UserPasswordEncoder;
use Symfony\Component\Translation\Translator;
use Sensio\Bundle\FrameworkExtraBundle\Configuration\Route;
use Symfony\Component\Form\AbstractType;
use Symfony\Component\Form\FormBuilderInterface;
use Symfony\Component\OptionsResolver\OptionsResolver;

class EmployerController extends Controller
{
     /**
     * @Route("/list", name="list")
     */

    public function listAction()
    {
        $em = $this->getDoctrine()->getManager();
        $user = $em->getRepository('SocieteBundle:User')->findAll();
        return $this->render('SocieteBundle:employer:list.html.twig', array('user' => $user));
    }
    public function supprimerAction($id)
    {
            $em = $this->getDoctrine()->getManager();
            $employer = $em->getRepository('SocieteBundle:User')->findOneBy(array('id' => $id));
            if ($employer != null)
            {
                $em->remove($employer);
                $em->flush();
                return $this->redirectToRoute('list');
            }
            return $this->redirectToRoute('list');
        }
    public function modifierAction(Request $req ,$id)
            {
                $em = $this->getDoctrine()->getManager();
                $employer = $em->getRepository('SocieteBundle:User')->find($id);
                // responsable acctuell
                $responsable=$employer->getResponsable()->getEmail();
                // usres liste des tout les responsable
                $newresemail=null;
                $newresemail  = $req->get('liste');
                $password=null ;
                $password  = $req->get('password');
                if ($password)
                {   // affecter le neveau mot de passe
                    $encoder = $this->container->get('security.password_encoder');
                    $newPasswordEncoded = $encoder->encodePassword($employer, $password);
                    $employer->setPassword($newPasswordEncoded);
                    $em->persist($employer);
                    $em->flush();
                }
                $responsables= $em->getRepository('SocieteBundle:User')->findAll();
                $form = $this->createForm(Modifieremployer::class, $employer);
                $form->handleRequest($req);
				if ($req->isMethod('POST'))
				{
                  if ($form->isValid()||($newresemail))
                    {
                        $res= $em->getRepository('SocieteBundle:User')->findoneBy(array("email" => $newresemail));
                        $employer->setResponsable($res);
                        $employer = $form->getData();
                        $em->persist($employer);
                        $em->flush();
                        return $this->redirectToRoute('list');
                    }
				}
                    return $this->render('SocieteBundle:employer:modifier.html.twig',array('form' => $form->createView(), 'responsable' => $responsable, 'responsables' => $responsables));
                }
 }