AttributeError: 'NoneType' object has no attribute 'policy'

[hayyanHasan]

Hello , Thank you for the helpful tool ... when I am trying to run it using ubuntu 16.04 as a host and android google nexus 4 and 5 with different APIs the following error comes up:

WARNING:Device:Seems like you are using an emulator. If so, please add is_emulator option.
Traceback (most recent call last):
File "/home/hayyan/droidbot/droidbot/droidbot.py", line 96, in init
self.app = App(app_path, output_dir=self.output_dir)
File "/home/hayyan/droidbot/droidbot/app.py", line 28, in init
from androguard.core.bytecodes.apk import APK
File "/usr/local/lib/python2.7/dist-packages/androguard/core/bytecodes/apk.py", line 9, in
from androguard.core.bytecodes.axml import ARSCParser, AXMLPrinter, ARSCResTableConfig, AXMLParser, format_value, START_TAG, END_TAG, TEXT, END_DOCUMENT
File "/usr/local/lib/python2.7/dist-packages/androguard/core/bytecodes/axml/init.py", line 17, in
from lxml import etree
ImportError: /usr/local/lib/python2.7/dist-packages/lxml/etree.so: file too short
[CONNECTION] ADB is disconnected
WARNING:DroidBotIme:Failed to disconnect DroidBotIME!
Traceback (most recent call last):
File "/usr/local/bin/droidbot", line 9, in
load_entry_point('droidbot', 'console_scripts', 'droidbot')()
File "/home/hayyan/droidbot/droidbot/start.py", line 168, in main
replay_output=opts.replay_output)
File "/home/hayyan/droidbot/droidbot/droidbot.py", line 116, in init
self.stop()
File "/home/hayyan/droidbot/droidbot/droidbot.py", line 191, in stop
if hasattr(self.input_manager.policy, "master") and
AttributeError: 'NoneType' object has no attribute 'policy'

Regards..