etherscan.client.EmptyResponse

[EnriqueGautoSand]

hello when execute api.get_balance_multiple() it raises this error
when i call
api = Account(address=[list of adress], api_key=one_key_in_string)
balances = api.get_balance_multiple()

this works about one year ago now i dont know why it fail

    balances = api.get_balance_multiple()
  File "/usr/local/lib/python3.6/dist-packages/etherscan/accounts.py", line 24,             in get_balance_multiple
    req = self.connect()
  File "/usr/local/lib/python3.6/dist-packages/etherscan/client.py", line 123, i            n connect
    raise EmptyResponse(data.get('message', 'no message'))
etherscan.client.EmptyResponse: <Err: NOTOK>

[antliv]

U robbd me