Django version 2.0.13, using settings 'openstack_dashboard.settings'
Starting development server at http://localhost:9000/
Quit the server with CONTROL-C.
ERROR django.request Internal Server Error: /auth/login/
Traceback (most recent call last):
  File "/home/ubuntu/horizon/.tox/venv/lib/python3.5/site-packages/django/core/handlers/exception.py", line 35, in inner
    response = get_response(request)
  File "/home/ubuntu/horizon/.tox/venv/lib/python3.5/site-packages/django/core/handlers/base.py", line 158, in _get_response
    response = self.process_exception_by_middleware(e, request)
  File "/home/ubuntu/horizon/.tox/venv/lib/python3.5/site-packages/django/core/handlers/base.py", line 156, in _get_response
    response = response.render()
  File "/home/ubuntu/horizon/.tox/venv/lib/python3.5/site-packages/django/template/response.py", line 106, in render
    self.content = self.rendered_content
  File "/home/ubuntu/horizon/.tox/venv/lib/python3.5/site-packages/django/template/response.py", line 83, in rendered_content
    content = template.render(context, self._request)
  File "/home/ubuntu/horizon/.tox/venv/lib/python3.5/site-packages/django/template/backends/django.py", line 61, in render
    return self.template.render(context)
  File "/home/ubuntu/horizon/.tox/venv/lib/python3.5/site-packages/django/template/base.py", line 175, in render
    return self._render(context)
  File "/home/ubuntu/horizon/.tox/venv/lib/python3.5/site-packages/django/template/base.py", line 167, in _render
    return self.nodelist.render(context)
  File "/home/ubuntu/horizon/.tox/venv/lib/python3.5/site-packages/django/template/base.py", line 943, in render
    bit = node.render_annotated(context)
  File "/home/ubuntu/horizon/.tox/venv/lib/python3.5/site-packages/django/template/base.py", line 910, in render_annotated
    return self.render(context)
  File "/home/ubuntu/horizon/.tox/venv/lib/python3.5/site-packages/django/template/loader_tags.py", line 155, in render
    return compiled_parent._render(context)
  File "/home/ubuntu/horizon/.tox/venv/lib/python3.5/site-packages/django/template/base.py", line 167, in _render
    return self.nodelist.render(context)
  File "/home/ubuntu/horizon/.tox/venv/lib/python3.5/site-packages/django/template/base.py", line 943, in render
    bit = node.render_annotated(context)
  File "/home/ubuntu/horizon/.tox/venv/lib/python3.5/site-packages/django/template/base.py", line 910, in render_annotated
    return self.render(context)
  File "/home/ubuntu/horizon/.tox/venv/lib/python3.5/site-packages/django/template/loader_tags.py", line 67, in render
    result = block.nodelist.render(context)
  File "/home/ubuntu/horizon/.tox/venv/lib/python3.5/site-packages/django/template/base.py", line 943, in render
    bit = node.render_annotated(context)
  File "/home/ubuntu/horizon/.tox/venv/lib/python3.5/site-packages/django/template/base.py", line 910, in render_annotated
    return self.render(context)
  File "/home/ubuntu/horizon/.tox/venv/lib/python3.5/site-packages/django/template/loader_tags.py", line 194, in render
    return template.render(context)
  File "/home/ubuntu/horizon/.tox/venv/lib/python3.5/site-packages/django/template/base.py", line 177, in render
    return self._render(context)
  File "/home/ubuntu/horizon/.tox/venv/lib/python3.5/site-packages/django/template/base.py", line 167, in _render
    return self.nodelist.render(context)
  File "/home/ubuntu/horizon/.tox/venv/lib/python3.5/site-packages/django/template/base.py", line 943, in render
    bit = node.render_annotated(context)
  File "/home/ubuntu/horizon/.tox/venv/lib/python3.5/site-packages/django/template/base.py", line 910, in render_annotated
    return self.render(context)
  File "/home/ubuntu/horizon/.tox/venv/lib/python3.5/site-packages/compressor/templatetags/compress.py", line 131, in render
    return self.render_compressed(context, self.kind, self.mode, forced=forced)
  File "/home/ubuntu/horizon/.tox/venv/lib/python3.5/site-packages/compressor/templatetags/compress.py", line 103, in render_compressed
    cache_key, cache_content = self.render_cached(compressor, kind, mode)
  File "/home/ubuntu/horizon/.tox/venv/lib/python3.5/site-packages/compressor/templatetags/compress.py", line 82, in render_cached
    cache_key = get_templatetag_cachekey(compressor, mode, kind)
  File "/home/ubuntu/horizon/.tox/venv/lib/python3.5/site-packages/compressor/cache.py", line 97, in get_templatetag_cachekey
    "templatetag.%s.%s.%s" % (compressor.cachekey, mode, kind))
  File "/home/ubuntu/horizon/.tox/venv/lib/python3.5/site-packages/django/utils/functional.py", line 36, in __get__
    res = instance.__dict__[self.name] = self.func(instance)
  File "/home/ubuntu/horizon/.tox/venv/lib/python3.5/site-packages/compressor/base.py", line 177, in cachekey
    [self.content] + self.mtimes).encode(self.charset), 12)
  File "/home/ubuntu/horizon/.tox/venv/lib/python3.5/site-packages/django/utils/functional.py", line 36, in __get__
    res = instance.__dict__[self.name] = self.func(instance)
  File "/home/ubuntu/horizon/.tox/venv/lib/python3.5/site-packages/compressor/base.py", line 171, in mtimes
    for kind, value, basename, elem in self.split_contents()
  File "/home/ubuntu/horizon/.tox/venv/lib/python3.5/site-packages/compressor/base.py", line 172, in <listcomp>
    if kind == SOURCE_FILE]
  File "/home/ubuntu/horizon/.tox/venv/lib/python3.5/site-packages/compressor/cache.py", line 103, in get_mtime
    mtime = cache.get(key)
  File "/home/ubuntu/horizon/.tox/venv/lib/python3.5/site-packages/django/utils/functional.py", line 215, in inner
    self._setup()
  File "/home/ubuntu/horizon/.tox/venv/lib/python3.5/site-packages/django/utils/functional.py", line 349, in _setup
    self._wrapped = self._setupfunc()
  File "/home/ubuntu/horizon/.tox/venv/lib/python3.5/site-packages/compressor/cache.py", line 158, in <lambda>
    cache = SimpleLazyObject(lambda: caches[settings.COMPRESS_CACHE_BACKEND])
  File "/home/ubuntu/horizon/.tox/venv/lib/python3.5/site-packages/django/core/cache/__init__.py", line 80, in __getitem__
    cache = _create_cache(alias)
  File "/home/ubuntu/horizon/.tox/venv/lib/python3.5/site-packages/django/core/cache/__init__.py", line 55, in _create_cache
    return backend_cls(location, params)
  File "/home/ubuntu/horizon/.tox/venv/lib/python3.5/site-packages/django/core/cache/backends/memcached.py", line 156, in __init__
    import memcache
ImportError: No module named 'memcache'
ERROR django.server "GET /auth/login/?next=/ HTTP/1.1" 500 552173