Internal Server Error

The server has either erred or is incapable of performing the requested operation.

Traceback (most recent call last):
  File "/base/alloc/tmpfs/dynamic_runtimes/python27/a7637d5531ec9deb_unzipped/python27_lib/versions/third_party/webapp2-2.5.2/webapp2.py", line 1535, in __call__
    rv = self.handle_exception(request, response, e)
  File "/base/alloc/tmpfs/dynamic_runtimes/python27/a7637d5531ec9deb_unzipped/python27_lib/versions/third_party/webapp2-2.5.2/webapp2.py", line 1529, in __call__
    rv = self.router.dispatch(request, response)
  File "/base/alloc/tmpfs/dynamic_runtimes/python27/a7637d5531ec9deb_unzipped/python27_lib/versions/third_party/webapp2-2.5.2/webapp2.py", line 1278, in default_dispatcher
    return route.handler_adapter(request, response)
  File "/base/alloc/tmpfs/dynamic_runtimes/python27/a7637d5531ec9deb_unzipped/python27_lib/versions/third_party/webapp2-2.5.2/webapp2.py", line 1102, in __call__
    return handler.dispatch()
  File "/base/alloc/tmpfs/dynamic_runtimes/python27/a7637d5531ec9deb_unzipped/python27_lib/versions/third_party/webapp2-2.5.2/webapp2.py", line 572, in dispatch
    return self.handle_exception(e, self.app.debug)
  File "/base/alloc/tmpfs/dynamic_runtimes/python27/a7637d5531ec9deb_unzipped/python27_lib/versions/third_party/webapp2-2.5.2/webapp2.py", line 570, in dispatch
    return method(*args, **kwargs)
  File "/base/data/home/apps/s~mention-tech/1.408033659792851681/main.py", line 345, in get
    result = urlfetch.fetch(url)
  File "/base/alloc/tmpfs/dynamic_runtimes/python27/a7637d5531ec9deb_unzipped/python27_lib/versions/1/google/appengine/api/urlfetch.py", line 293, in fetch
    return rpc.get_result()
  File "/base/alloc/tmpfs/dynamic_runtimes/python27/a7637d5531ec9deb_unzipped/python27_lib/versions/1/google/appengine/api/apiproxy_stub_map.py", line 613, in get_result
    return self.__get_result_hook(self)
  File "/base/alloc/tmpfs/dynamic_runtimes/python27/a7637d5531ec9deb_unzipped/python27_lib/versions/1/google/appengine/api/urlfetch.py", line 433, in _get_fetch_result
    'Connection closed unexpectedly by server at URL: ' + url)
ConnectionClosedError: Connection closed unexpectedly by server at URL: http://archive.org/wayback/available?url=http://tummelvision.tv/tag/supernova/