socket.io client 0.9.8 causes KeyError exceptions about gevent-socketio HOT 6 CLOSED

Traceback (most recent call last):
  File "/home/raj/_env/lib/python2.7/site-packages/gevent/greenlet.py", line 390, in run
    result = self._run(*self.args, **self.kwargs)
  File "/home/raj/_env/lib/python2.7/site-packages/pyramid/router.py", line 187, in __call__
    response = self.handle_request(request)
  File "/home/raj/_env/lib/python2.7/site-packages/pyramid/tweens.py", line 20, in excview_tween
    response = handler(request)
  File "/home/raj/_env/lib/python2.7/site-packages/pyramid/router.py", line 164, in handle_request
    response = view_callable(context, request)
  File "/home/raj/_env/lib/python2.7/site-packages/pyramid/config/views.py", line 352, in rendered_view
    context)
  File "/home/raj/_env/lib/python2.7/site-packages/pyramid/renderers.py", line 396, in render_view
    return self.render_to_response(response, system, request=request)
  File "/home/raj/_env/lib/python2.7/site-packages/pyramid/renderers.py", line 426, in render_to_response
    result = self.render(value, system_values, request=request)
  File "/home/raj/_env/lib/python2.7/site-packages/pyramid/renderers.py", line 422, in render
    result = renderer(value, system_values)
  File "/home/raj/_env/lib/python2.7/site-packages/pyramid/mako_templating.py", line 176, in __call__
    raise ValueError('renderer was passed non-dictionary as value')
ValueError: renderer was passed non-dictionary as value
<Greenlet at 0x23ee050: <pyramid.router.Router object at 0x235dd10>({'bfg.routes.matchdict': {'remaining': (u'1', u'we, <function <lambda> at 0x2360938>)> failed with ValueError

    retval = None
    if 'socketio' in request.environ:
        retval = socketio_manage(request.environ, ns_dict, request)
    return HttpResponse(retval)