Django-CMS - 'module' object has no attribute 'allowed_elements'

Django-CMS - page creation error

Environment:


Request Method: POST
Request URL: http://localhost:8000/en/cms_wizard/create/

Django Version: 1.11.16
Python Version: 2.7.15
Installed Applications:
('djangocms_admin_style',
 'django.contrib.auth',
 'django.contrib.contenttypes',
 'django.contrib.sessions',
 'django.contrib.admin',
 'django.contrib.sites',
 'django.contrib.sitemaps',
 'django.contrib.staticfiles',
 'django.contrib.messages',
 'cms',
 'menus',
 'sekizai',
 'treebeard',
 'djangocms_text_ckeditor',
 'filer',
 'easy_thumbnails',
 'djangocms_column',
 'djangocms_file',
 'djangocms_link',
 'djangocms_picture',
 'djangocms_style',
 'djangocms_snippet',
 'djangocms_googlemap',
 'djangocms_video',
 'mysite')
Installed Middleware:
('cms.middleware.utils.ApphookReloadMiddleware',
 'django.contrib.sessions.middleware.SessionMiddleware',
 'django.middleware.csrf.CsrfViewMiddleware',
 'django.contrib.auth.middleware.AuthenticationMiddleware',
 'django.contrib.messages.middleware.MessageMiddleware',
 'django.middleware.locale.LocaleMiddleware',
 'django.middleware.common.CommonMiddleware',
 'django.middleware.clickjacking.XFrameOptionsMiddleware',
 'cms.middleware.user.CurrentUserMiddleware',
 'cms.middleware.page.CurrentPageMiddleware',
 'cms.middleware.toolbar.ToolbarMiddleware',
 'cms.middleware.language.LanguageCookieMiddleware')



Traceback:

File "/home/user/environments/project/local/lib/python2.7/site-packages/django/core/handlers/exception.py" in inner
  41.             response = get_response(request)

File "/home/user/environments/project/local/lib/python2.7/site-packages/django/core/handlers/base.py" in _get_response
  187.                 response = self.process_exception_by_middleware(e, request)

File "/home/user/environments/project/local/lib/python2.7/site-packages/django/core/handlers/base.py" in _get_response
  185.                 response = wrapped_callback(request, *callback_args, **callback_kwargs)

File "/home/user/environments/project/local/lib/python2.7/site-packages/django/views/generic/base.py" in view
  68.             return self.dispatch(request, *args, **kwargs)

File "/home/user/environments/project/local/lib/python2.7/site-packages/cms/wizards/views.py" in dispatch
  45.         return super(WizardCreateView, self).dispatch(*args, **kwargs)

File "/home/user/environments/project/local/lib/python2.7/site-packages/formtools/wizard/views.py" in dispatch
  248.         response = super(WizardView, self).dispatch(request, *args, **kwargs)

File "/home/user/environments/project/local/lib/python2.7/site-packages/django/views/generic/base.py" in dispatch
  88.         return handler(request, *args, **kwargs)

File "/home/user/environments/project/local/lib/python2.7/site-packages/formtools/wizard/views.py" in post
  309.                 return self.render_done(form, **kwargs)

File "/home/user/environments/project/local/lib/python2.7/site-packages/formtools/wizard/views.py" in render_done
  365.         done_response = self.done(final_forms.values(), form_dict=final_forms, **kwargs)

File "/home/user/environments/project/local/lib/python2.7/site-packages/cms/wizards/views.py" in done
  145.         instance = form_two.save()

File "/home/user/environments/project/local/lib/python2.7/site-packages/django/utils/decorators.py" in inner
  185.                     return func(*args, **kwargs)

File "/home/user/environments/project/local/lib/python2.7/site-packages/cms/forms/wizards.py" in save
  194.                     add_plugin(**opts)

File "/home/user/environments/project/local/lib/python2.7/site-packages/django/utils/decorators.py" in inner
  185.                     return func(*args, **kwargs)

File "/home/user/environments/project/local/lib/python2.7/site-packages/cms/api.py" in add_plugin
  325.     plugin.save()

File "/home/user/environments/project/local/lib/python2.7/site-packages/djangocms_text_ckeditor/models.py" in save
  58.         body = clean_html(body, full=False)

File "/home/user/environments/project/local/lib/python2.7/site-packages/djangocms_text_ckeditor/html.py" in clean_html
  66.     kwargs = _filter_kwargs()

File "/home/user/environments/project/local/lib/python2.7/site-packages/djangocms_text_ckeditor/html.py" in _filter_kwargs
  21.         'allowed_elements': sanitizer.allowed_elements | frozenset(

Exception Type: AttributeError at /en/cms_wizard/create/
Exception Value: 'module' object has no attribute 'allowed_elements'