EWS https://mail.company.com/EWS/Exchange.asmx, account None: Exception in _get_elements: Traceback (most recent call last):


 "/path/to/virtualenv/lib/python3.5/site-packages/cached_property.py", line 69, in __get__

return obj_dict[name]
KeyError: 'protocol'

`Traceback (most recent call last):


 "C:\Python27\lib\site-packages\itchat\components\login.py", line 244, in maintain_loop

i = sync_check(self)


 "C:\Python27\lib\site-packages\itchat\components\login.py", line 289, in sync_check

url = '%s/synccheck' % self.loginInfo.get('syncUrl', self.loginInfo['url'])
KeyError: 'url'`
