Rasa.core.run.serve_application(agent, channel='cmdline') not working in 1.1.6

I have migrated from rasa 0.12.4 to rasa 1.1.6 i am not able to run rasa.core.run.serve_application(agent, channel=‘cmdline’) Below is my code please check

def run_weather_bot(serve_forever=True):

interpreter = RasaNLUInterpreter(‘C:\Samples\xxx\models\nlu\default\weathernlu’)

action_endpoint = EndpointConfig(url="http://localhost:5055/webhook")
agent = Agent.load('C:\\Samples\\xxx\\models\\dialogue', interpreter=interpreter, action_endpoint=action_endpoint)
rasa.core.run.serve_application(agent, channel='cmdline')

return agent

I am getting error related to event broker