sslstrip on non hsts site error

[brunoaduarte]

I've got this error when attacking a non hsts https website, do you know how to fix this ?

sslstrip 0.9 by Moxie Marlinspike running...
Unhandled Error
Traceback (most recent call last):
File "sslstrip.py", line 105, in main
reactor.run()
File "/usr/lib/python2.7/dist-packages/twisted/internet/base.py", line 1192, in run
self.mainLoop()
File "/usr/lib/python2.7/dist-packages/twisted/internet/base.py", line 1204, in mainLoop
self.doIteration(t)
File "/usr/lib/python2.7/dist-packages/twisted/internet/epollreactor.py", line 396, in doPoll
log.callWithLogger(selectable, _drdw, selectable, fd, event)
--- ---
File "/usr/lib/python2.7/dist-packages/twisted/python/log.py", line 88, in callWithLogger
return callWithContext({"system": lp}, func, _args, *_kw)
File "/usr/lib/python2.7/dist-packages/twisted/python/log.py", line 73, in callWithContext
return context.call({ILogContext: newCtx}, func, _args, *_kw)
File "/usr/lib/python2.7/dist-packages/twisted/python/context.py", line 118, in callWithContext
return self.currentContext().callWithContext(ctx, func, _args, *_kw)
File "/usr/lib/python2.7/dist-packages/twisted/python/context.py", line 81, in callWithContext
return func(args,*kw)
File "/usr/lib/python2.7/dist-packages/twisted/internet/posixbase.py", line 627, in _doReadOrWrite
self._disconnectSelectable(selectable, why, inRead)
File "/usr/lib/python2.7/dist-packages/twisted/internet/posixbase.py", line 260, in _disconnectSelectable
selectable.connectionLost(f)
File "/usr/lib/python2.7/dist-packages/twisted/internet/tcp.py", line 484, in connectionLost
self._commonConnection.connectionLost(self, reason)
File "/usr/lib/python2.7/dist-packages/twisted/internet/tcp.py", line 298, in connectionLost
protocol.connectionLost(reason)
File "/usr/lib/python2.7/dist-packages/twisted/protocols/tls.py", line 477, in connectionLost
ProtocolWrapper.connectionLost(self, reason)
File "/usr/lib/python2.7/dist-packages/twisted/protocols/policies.py", line 125, in connectionLost
self.wrappedProtocol.connectionLost(reason)
File "/usr/lib/python2.7/dist-packages/twisted/web/http.py", line 474, in connectionLost
self.handleResponseEnd()
File "/root/Downloads/sslhack/sslstrip/sslstrip/ServerConnection.py", line 119, in handleResponseEnd
HTTPClient.handleResponseEnd(self)
File "/usr/lib/python2.7/dist-packages/twisted/web/http.py", line 485, in handleResponseEnd
self.handleResponse(b)
File "/root/Downloads/sslhack/sslstrip/sslstrip/ServerConnection.py", line 133, in handleResponse
self.client.write(data)
File "/usr/lib/python2.7/dist-packages/twisted/web/http.py", line 962, in write
raise RuntimeError('Request.write called on a request after '
exceptions.RuntimeError: Request.write called on a request after Request.finish was called.