ERROR Internal Server Error: /en/checkout/paypal/preview/5/
Traceback (most recent call last):
  File "/virtenvs/test/lib/python2.7/site-packages/django/core/handlers/base.py", line 132, in get_response
    response = wrapped_callback(request, *callback_args, **callback_kwargs)
  File "/virtenvs/test/lib/python2.7/site-packages/django/utils/decorators.py", line 145, in inner
    return func(*args, **kwargs)
  File "/virtenvs/test/lib/python2.7/site-packages/django/views/generic/base.py", line 71, in view
    return self.dispatch(request, *args, **kwargs)
  File "/virtenvs/test/lib/python2.7/site-packages/oscar/apps/checkout/session.py", line 68, in dispatch
    request, *args, **kwargs)
  File "/virtenvs/test/lib/python2.7/site-packages/django/views/generic/base.py", line 89, in dispatch
    return handler(request, *args, **kwargs)
  File "/virtenvs/test/lib/python2.7/site-packages/paypal/express/views.py", line 200, in get
    kwargs['basket'] = self.load_frozen_basket(kwargs['basket_id'])
  File "/virtenvs/test/lib/python2.7/site-packages/paypal/express/views.py", line 231, in load_frozen_basket
    Applicator().apply(self.request, basket)
  File "/virtenvs/test/lib/python2.7/site-packages/oscar/apps/offer/applicator.py", line 26, in apply
    offers = self.get_offers(basket, user, request)
  File "/virtenvs/test/lib/python2.7/site-packages/oscar/apps/offer/applicator.py", line 58, in get_offers
    basket_offers = self.get_basket_offers(basket, user)
  File "/virtenvs/test/lib/python2.7/site-packages/oscar/apps/offer/applicator.py", line 94, in get_basket_offers
    if not basket.id or not user:
AttributeError: 'WSGIRequest' object has no attribute 'id'