Bugs in worker

worker.log

WSGI application error
Traceback (most recent call last):
  File "/home/ubuntu/.local/share/virtualenvs/nucypher-fvStivKV/lib/python3.6/site-packages/twisted/python/context.py", line 122, in callWithContext
    return self.currentContext().callWithContext(ctx, func, *args, **kw)
  File "/home/ubuntu/.local/share/virtualenvs/nucypher-fvStivKV/lib/python3.6/site-packages/twisted/python/context.py", line 87, in callWithContext
    self.contexts.pop()
  File "/home/ubuntu/.local/share/virtualenvs/nucypher-fvStivKV/lib/python3.6/site-packages/hendrix/facilities/response.py", line 27, in run
    return ran
  File "/home/ubuntu/.local/share/virtualenvs/nucypher-fvStivKV/lib/python3.6/site-packages/twisted/web/wsgi.py", line 533, in run
    self.started = True
--- <exception caught here> ---
  File "/home/ubuntu/.local/share/virtualenvs/nucypher-fvStivKV/lib/python3.6/site-packages/twisted/web/wsgi.py", line 508, in run
    self.write(elem)
  File "/home/ubuntu/.local/share/virtualenvs/nucypher-fvStivKV/lib/python3.6/site-packages/twisted/web/wsgi.py", line 463, in write
    self.reactor, wsgiWrite, self.started)
  File "/home/ubuntu/.local/share/virtualenvs/nucypher-fvStivKV/lib/python3.6/site-packages/twisted/internet/threads.py", line 122, in blockingCallFromThread
    result.raiseException()
  File "/home/ubuntu/.local/share/virtualenvs/nucypher-fvStivKV/lib/python3.6/site-packages/twisted/python/failure.py", line 488, in raiseException
    raise self.value.with_traceback(self.tb)
builtins.AttributeError: 'NoneType' object has no attribute 'writeHeaders'

Unhandled Error
Traceback (most recent call last):
  File "/home/ubuntu/nucypher/nucypher/cli/characters/ursula.py", line 310, in ursula
    node_deployer.run()   # <--- Blocking Call (Reactor)
  File "/home/ubuntu/.local/share/virtualenvs/nucypher-fvStivKV/lib/python3.6/site-packages/hendrix/deploy/base.py", line 184, in run
    self.reactor.run()
  File "/home/ubuntu/.local/share/virtualenvs/nucypher-fvStivKV/lib/python3.6/site-packages/twisted/internet/base.py", line 1272, in run
    self.mainLoop()
  File "/home/ubuntu/.local/share/virtualenvs/nucypher-fvStivKV/lib/python3.6/site-packages/twisted/internet/base.py", line 1281, in mainLoop
    self.runUntilCurrent()
--- <exception caught here> ---
  File "/home/ubuntu/.local/share/virtualenvs/nucypher-fvStivKV/lib/python3.6/site-packages/twisted/internet/base.py", line 875, in runUntilCurrent
    f(*a, **kw)
  File "/home/ubuntu/.local/share/virtualenvs/nucypher-fvStivKV/lib/python3.6/site-packages/twisted/web/wsgi.py", line 521, in wsgiError
    self.request.loseConnection()
  File "/home/ubuntu/.local/share/virtualenvs/nucypher-fvStivKV/lib/python3.6/site-packages/twisted/web/http.py", line 1556, in loseConnection
    self.channel.loseConnection()
builtins.AttributeError: 'NoneType' object has no attribute 'loseConnection'