Fritz!Box 3390 KeyError: 'Hosts:1'

Fritzbox 3390 FRITZ!OS 6.52 and 7.01.
Tried with password and with username and password.

Error setting up platform fritz
Traceback (most recent call last):
File “/srv/homeassistant/lib/python3.5/site-packages/fritzconnection/fritzconnection.py”, line 376, in _get_action
service = self.services[service_name]
KeyError: ‘Hosts:1’

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File “/srv/homeassistant/lib/python3.5/site-packages/homeassistant/components/device_tracker/init.py”, line 176, in async_setup_platform
platform.get_scanner, hass, {DOMAIN: p_config})
File “/usr/lib/python3.5/asyncio/futures.py”, line 380, in iter
yield self # This tells Task to wait for completion.
File “/usr/lib/python3.5/asyncio/tasks.py”, line 304, in _wakeup
future.result()
File “/usr/lib/python3.5/asyncio/futures.py”, line 293, in result
raise self._exception
File “/usr/lib/python3.5/concurrent/futures/thread.py”, line 55, in run
result = self.fn(*self.args, **self.kwargs)
File “/srv/homeassistant/lib/python3.5/site-packages/homeassistant/components/device_tracker/fritz.py”, line 31, in get_scanner
scanner = FritzBoxScanner(config[DOMAIN])
File “/srv/homeassistant/lib/python3.5/site-packages/homeassistant/components/device_tracker/fritz.py”, line 63, in init
self._update_info()
File “/srv/homeassistant/lib/python3.5/site-packages/homeassistant/components/device_tracker/fritz.py”, line 92, in _update_info
self.last_results = self.fritz_box.get_hosts_info()
File “/srv/homeassistant/lib/python3.5/site-packages/fritzconnection/fritzhosts.py”, line 77, in get_hosts_info
while index < self.host_numbers:
File “/srv/homeassistant/lib/python3.5/site-packages/fritzconnection/fritzhosts.py”, line 59, in host_numbers
result = self.action(‘GetHostNumberOfEntries’)
File “/srv/homeassistant/lib/python3.5/site-packages/fritzconnection/fritzhosts.py”, line 51, in action
return self.fc.call_action(SERVICE, actionname, **kwargs)
File “/srv/homeassistant/lib/python3.5/site-packages/fritzconnection/fritzconnection.py”, line 405, in call_action
action = self._get_action(service_name, action_name)
File “/srv/homeassistant/lib/python3.5/site-packages/fritzconnection/fritzconnection.py”, line 378, in _get_action
raise ServiceError('Unknown Service: ’ + service_name)
fritzconnection.fritzconnection.ServiceError: Unknown Service: Hosts:1

Can confirm, same issue here.
Fritz!Box 7490, FritzOS 7.01
HA 0.85.1 in venv
python3-lxml, libxslt-dev, libxml2-dev, zlib1g-dev are installed over apt-get
libxml (4.2.5) is installed in venv

Lines logged are exactly the same as by topicstarter.