Scripts consistently crash mitmproxy

Every script I run from ui crashes with the following error:

Traceback (most recent call last):
  File "/home/chris/itsdangerous/local/lib/python2.7/site-packages/mitmproxy/console/master.py", line 537, in run
    self.loop.run()
  File "/home/chris/itsdangerous/local/lib/python2.7/site-packages/urwid/main_loop.py", line 278, in run
    self._run()
  File "/home/chris/itsdangerous/local/lib/python2.7/site-packages/urwid/main_loop.py", line 376, in _run
    self.event_loop.run()
  File "/home/chris/itsdangerous/local/lib/python2.7/site-packages/urwid/main_loop.py", line 682, in run
    self._loop()
  File "/home/chris/itsdangerous/local/lib/python2.7/site-packages/urwid/main_loop.py", line 719, in _loop
    self._watch_files[fd]()
  File "/home/chris/itsdangerous/local/lib/python2.7/site-packages/urwid/raw_display.py", line 393, in <lambda>
    event_loop, callback, self.get_available_raw_input())
  File "/home/chris/itsdangerous/local/lib/python2.7/site-packages/urwid/raw_display.py", line 493, in parse_input
    callback(processed, processed_codes)
  File "/home/chris/itsdangerous/local/lib/python2.7/site-packages/urwid/main_loop.py", line 403, in _update
    self.process_input(keys)
  File "/home/chris/itsdangerous/local/lib/python2.7/site-packages/urwid/main_loop.py", line 503, in process_input
    k = self._topmost_widget.keypress(self.screen_size, k)
  File "/home/chris/itsdangerous/local/lib/python2.7/site-packages/mitmproxy/console/window.py", line 78, in keypress
    k = super(self.__class__, self).keypress(size, k)
  File "/home/chris/itsdangerous/local/lib/python2.7/site-packages/urwid/container.py", line 1116, in keypress
    return self.footer.keypress((maxcol,),key)
  File "/home/chris/itsdangerous/local/lib/python2.7/site-packages/mitmproxy/console/statusbar.py", line 134, in keypress
    return self.master.ab.keypress(*args, **kwargs)
  File "/home/chris/itsdangerous/local/lib/python2.7/site-packages/mitmproxy/console/statusbar.py", line 89, in keypress
    self.prompt_execute(self._w.get_edit_text())
  File "/home/chris/itsdangerous/local/lib/python2.7/site-packages/mitmproxy/console/statusbar.py", line 112, in prompt_execute
    msg = p(txt, *args)
  File "/home/chris/itsdangerous/local/lib/python2.7/site-packages/mitmproxy/console/master.py", line 353, in run_script_once
    except script.ScriptException as e:
AttributeError: 'module' object has no attribute 'ScriptException'

mitmproxy has crashed!
Please lodge a bug report at:
	https://github.com/mitmproxy/mitmproxy

I’m new to this so I’m probably doing something silly, I just have no idea what.

This is a known bug: https://github.com/mitmproxy/mitmproxy/issues/1418

Sorry!

Thanks for the response. At least I know now I’m not doing something wrong.