Die anzeigen kamen nicht wieder ein HttpResponse-Objekt. Es kehrte Keine statt. Request Method: POST

Das problem erscheint, wenn ich das Formular abschicken. Vor ein paar Tagen hat es geklappt, habe nichts verändert in diesem code, aber jetzt scheitert es. Ist es möglich, dass verschiedene module ermöglicht, dass ein Teil des Codes abgestürzt?
Traceback:

Umgebung:

Request Method: POST
Request URL: http://127.0.0.1:8000/users/new/

Django Version: 1.7.3
Python Version: 3.4.0
Installed Applications:
('django.contrib.admin',
 'django.contrib.auth',
 'django.contrib.contenttypes',
 'django.contrib.sessions',
 'django.contrib.messages',
 'django.contrib.staticfiles',
 'mojblog',
 'users')
Installed Middleware:
('django.contrib.sessions.middleware.SessionMiddleware',
 'django.middleware.common.CommonMiddleware',
 'django.middleware.csrf.CsrfViewMiddleware',
 'django.contrib.auth.middleware.AuthenticationMiddleware',
 'django.contrib.auth.middleware.SessionAuthenticationMiddleware',
 'django.contrib.messages.middleware.MessageMiddleware',
 'django.middleware.clickjacking.XFrameOptionsMiddleware')


Traceback:
File "/home/marta/django/djangovenv/lib/python3.4/site-packages/django/core/handlers/base.py" in get_response
  130.                                  % (callback.__module__, view_name))

Exception Type: ValueError at /users/new/
Exception Value: The view users.views.create didn't return an HttpResponse object. It returned None instead.

Code:

from django.shortcuts import render, redirect
from django.http import HttpResponse
from users.forms import UserCreationForm
from django.contrib.auth.models import User
from users.models import Profile


def test(request):
    return HttpResponse('users!')


def create(request):
    if request.method =="POST":
        new_user=User()
        form = UserCreationForm(request.POST, instance=new_user)
        if form.is_valid():
            new_user=form.save(commit=False)
            new_user.is_active=False
            new_user.save()
            return redirect("users:new")

    else:
        form = UserCreationForm()
        return render(request, 'users/create.html', {'form1': form})


    # else:
    #   return HttpResponse("something")        

def activate(request, key):

    profile=Profile.objects.get(secret=key)
    user=profile.user
    user.is_active=True
    user.save()



    return render(request, 'users/activate.html', {})