cellery.error

    tasks]
      . UploadExpert.celery.debug_task
      . VideoPublish.tasks.GetTitles
    
    [2018-11-28 20:44:18,423: INFO/MainProcess] Connected to redis://localhost:6379//
    [2018-11-28 20:44:18,439: INFO/MainProcess] mingle: searching for neighbors
    [2018-11-28 20:44:19,447: INFO/MainProcess] mingle: all alone
    [2018-11-28 20:44:19,463: WARNING/MainProcess] /Users/admin/.virtualenvs/pyhton3/lib/python3.6/site-packages/celery/fixups/django.py:265: UserWarning: Using settings.DEBUG leads to a memory leak, never use this setting in production environments!
      warnings.warn('Using settings.DEBUG leads to a memory leak, never '
    [2018-11-28 20:44:19,463: WARNING/MainProcess] celery@jobdone ready.
    [2018-11-28 20:47:06,711: ERROR/MainProcess] Unrecoverable error: AttributeError("'str' object has no attribute 'items'",)
    Traceback (most recent call last):
      File "/Users/admin/.virtualenvs/pyhton3/lib/python3.6/site-packages/celery/worker/__init__.py", line 206, in start
        self.blueprint.start(self)
      File "/Users/admin/.virtualenvs/pyhton3/lib/python3.6/site-packages/celery/bootsteps.py", line 123, in start
        step.start(parent)
      File "/Users/admin/.virtualenvs/pyhton3/lib/python3.6/site-packages/celery/bootsteps.py", line 374, in start
        return self.obj.start()
      File "/Users/admin/.virtualenvs/pyhton3/lib/python3.6/site-packages/celery/worker/consumer.py", line 278, in start
        blueprint.start(self)
      File "/Users/admin/.virtualenvs/pyhton3/lib/python3.6/site-packages/celery/bootsteps.py", line 123, in start
        step.start(parent)
      File "/Users/admin/.virtualenvs/pyhton3/lib/python3.6/site-packages/celery/worker/consumer.py", line 821, in start
        c.loop(*c.loop_args())
      File "/Users/admin/.virtualenvs/pyhton3/lib/python3.6/site-packages/celery/worker/loops.py", line 70, in asynloop
        next(loop)
      File "/Users/admin/.virtualenvs/pyhton3/lib/python3.6/site-packages/kombu/async/hub.py", line 340, in create_loop
        cb(*cbargs)
      File "/Users/admin/.virtualenvs/pyhton3/lib/python3.6/site-packages/kombu/transport/redis.py", line 1019, in on_readable
        self._callbacks[queue](message)
      File "/Users/admin/.virtualenvs/pyhton3/lib/python3.6/site-packages/kombu/transport/virtual/__init__.py", line 534, in _callback
        self.qos.append(message, message.delivery_tag)
      File "/Users/admin/.virtualenvs/pyhton3/lib/python3.6/site-packages/kombu/transport/redis.py", line 146, in append
        pipe.zadd(self.unacked_index_key, delivery_tag, time()) \
      File "/Users/admin/.virtualenvs/pyhton3/lib/python3.6/site-packages/redis/client.py", line 2263, in zadd
        for pair in iteritems(mapping):
      File "/Users/admin/.virtualenvs/pyhton3/lib/python3.6/site-packages/redis/_compat.py", line 123, in iteritems
        return iter(x.items())
    AttributeError: 'str' object has no attribute 'items'