Estou tomando erro depois de mudar o topico

AWSIoTPythonSDK.core.protocol.mqtt_core - ERROR - Subscribe timed out
Traceback (most recent call last):
  File "aws-iot-device-sdk-python/samples/basicPubSub/basicPubSub.py", line 110, in <module>
    myAWSIoTMQTTClient.subscribe(topic, 1, customCallback)
  File "/home/pi/.local/lib/python2.7/site-packages/AWSIoTPythonSDK/MQTTLib.py", line 668, in subscribe
    return self._mqtt_core.subscribe(topic, QoS, callback)
  File "/home/pi/.local/lib/python2.7/site-packages/AWSIoTPythonSDK/core/protocol/mqtt_core.py", line 302, in subscribe
    raise subscribeTimeoutException()
AWSIoTPythonSDK.exception.AWSIoTExceptions.subscribeTimeoutException