File "/home/kzaportal/pyenv/lib/python2.5/site-packages/django/core/handlers/base.py" in get_response 111. response = callback(request, *callback_args, **callback_kwargs)File "/home/kzaportal/pyenv/lib/python2.5/site-packages/django/contrib/admin/options.py" in wrapper 307. return self.admin_site.admin_view(view)(*args, **kwargs)File "/home/kzaportal/pyenv/lib/python2.5/site-packages/django/utils/decorators.py" in _wrapped_view 93. response = view_func(request, *args, **kwargs)File "/home/kzaportal/pyenv/lib/python2.5/site-packages/django/views/decorators/cache.py" in _wrapped_view_func 80. add_never_cache_headers(response)File "/home/kzaportal/pyenv/lib/python2.5/site-packages/django/utils/cache.py" in add_never_cache_headers 116. patch_response_headers(response, cache_timeout=-1)File "/home/kzaportal/pyenv/lib/python2.5/site-packages/django/utils/cache.py" in patch_response_headers 106. if not response.has_header('Last-Modified'):Exception Type: AttributeError at /admin/cvtool/moderatedcv/2/Exception Value: 'NoneType' object has no attribute 'has_header'