My instance was not available and the only way to get it working again was a reboot of the docker containers.
I see this in the log:
2020-10-17 08:19:55 ERROR (MainThread) [homeassistant.components.hassio.handler] Client error on /supervisor/ping request Cannot connect to host 172.30.32.2:80 ssl:default [Connect call failed ('172.30.32.2', 80)]
2020-10-17 08:19:55 WARNING (MainThread) [homeassistant.components.hassio] Not connected with Hass.io / system too busy!
2020-10-17 08:19:56 ERROR (MainThread) [homeassistant.components.hassio.handler] Client error on /homeassistant/options request Cannot connect to host 172.30.32.2:80 ssl:default [Connect call failed ('172.30.32.2', 80)]
2020-10-17 08:19:56 ERROR (MainThread) [homeassistant.components.hassio.handler] Client error on /supervisor/options request Cannot connect to host 172.30.32.2:80 ssl:default [Connect call failed ('172.30.32.2', 80)]
2020-10-17 08:19:56 ERROR (MainThread) [homeassistant.components.hassio.handler] Client error on /info request Cannot connect to host 172.30.32.2:80 ssl:default [Connect call failed ('172.30.32.2', 80)]
2020-10-17 08:19:56 WARNING (MainThread) [homeassistant.components.hassio] Can't read last version:
2020-10-17 08:19:56 ERROR (MainThread) [homeassistant.components.hassio.handler] Client error on /ingress/panels request Cannot connect to host 172.30.32.2:80 ssl:default [Connect call failed ('172.30.32.2', 80)]
2020-10-17 08:19:56 ERROR (MainThread) [homeassistant.components.hassio.addon_panel] Can't read panel info:
2020-10-17 08:19:59 ERROR (MainThread) [homeassistant.components.updater] Unexpected error fetching Home Assistant update data: 'NoneType' object is not subscriptable
Traceback (most recent call last):
File "/usr/src/homeassistant/homeassistant/helpers/update_coordinator.py", line 143, in async_refresh
self.data = await self._async_update_data()
File "/usr/src/homeassistant/homeassistant/helpers/update_coordinator.py", line 131, in _async_update_data
return await self.update_method()
File "/usr/src/homeassistant/homeassistant/components/updater/__init__.py", line 82, in check_new_version
newest = core_info["version_latest"]
TypeError: 'NoneType' object is not subscriptable
2020-10-17 08:20:02 ERROR (MainThread) [homeassistant.components.hassio.handler] Client error on /discovery request Cannot connect to host 172.30.32.2:80 ssl:default [Connect call failed ('172.30.32.2', 80)]
2020-10-17 08:20:02 ERROR (MainThread) [homeassistant.components.hassio.discovery] Can't read discover info:
Did it crash ?