airtest连接IOS的时候报错

airtest连接IOS的时候报错：


[ERROR] Traceback (most recent call last):
  File "app/plugins/devicepool/abstract/device.py", line 82, in run
  File "app/plugins/devicepool/ios/device.py", line 81, in connect
  File "airtest/core/api.py", line 79, in connect_device
    dev = init_device(platform, uuid, **params)
  File "airtest/core/api.py", line 43, in init_device
    dev = cls(uuid, **kwargs)
  File "/Applications/AirtestIDE.app/Contents/MacOS/airtest/core/ios/ios.py", line 114, in __init__
    self.instruct_helper = InstructHelper(info['uuid'])
TypeError: string indices must be integers

WDA已经成功安装到手机上了，http://127.0.0.1:8100/status%E8%BF%99%E4%B8%AA%E4%B9%9F%E6%88%90%E5%8A%9F%E4%BA%86%EF%BC%88%E4%B8%8B%E5%9B%BE%EF%BC%89%EF%BC%8C%E8%AF%B7%E9%97%AE%E6%98%AF%E4%BB%80%E4%B9%88%E5%8E%9F%E5%9B%A0%E5%95%8A%EF%BC%8C%E5%9B%B0%E6%89%B0%E5%A5%BD%E5%87%A0%E5%A4%A9%E4%BA%86

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