Many errors after upgrading from 0.42.3 to 0.42.4

Just upgraded from 0.42.3 to 0.42.4. I have so many errors I don’t know where to start. There were no errors during the upgrade process. Here is first error in log after rebooting:

17-04-17 15:54:45 ERROR (MainThread) [homeassistant.loader] Error loading homeassistant.components.frontend. Make sure all dependencies are installed
Traceback (most recent call last):
File “/srv/hass/hass_venv/lib/python3.4/site-packages/homeassistant/loader.py”, line 141, in get_component
module = importlib.import_module(path)
File “/srv/hass/hass_venv/lib/python3.4/importlib/init.py”, line 109, in import_module
return _bootstrap._gcd_import(name[level:], package, level)
File “”, line 2254, in _gcd_import
File “”, line 2237, in _find_and_load
File “”, line 2226, in _find_and_load_unlocked
File “”, line 1200, in _load_unlocked
File “”, line 1129, in _exec
File “”, line 1471, in exec_module
File “”, line 321, in _call_with_frames_removed
File “/srv/hass/hass_venv/lib/python3.4/site-packages/homeassistant/components/frontend/init.py”, line 12, in
from homeassistant.components import api, group
File “/srv/hass/hass_venv/lib/python3.4/site-packages/homeassistant/components/api.py”, line 26, in
from homeassistant.helpers.state import AsyncTrackStates
File “/srv/hass/hass_venv/lib/python3.4/site-packages/homeassistant/helpers/state.py”, line 8, in
from homeassistant.components.media_player import (
File “/srv/hass/hass_venv/lib/python3.4/site-packages/homeassistant/components/media_player/init.py”, line 24, in
from homeassistant.components.http import HomeAssistantView, KEY_AUTHENTICATED
File “/srv/hass/hass_venv/lib/python3.4/site-packages/homeassistant/components/http/init.py”, line 16, in
from aiohttp.web_exceptions import HTTPUnauthorized, HTTPMovedPermanently
ImportError: cannot import name ‘HTTPUnauthorized’

Any suggestions?