Looking further back in the error report, back to when I think that I turned the NUC off & on again using the power button (not friendly, I know ), does anything show up here as a potential cause of my woes?
NB: Roon and Roon ROCK refer to my music server (on another NUC). I do have a fairly recent HA Snapshot on my laptop, but wouldn’t know if it is possible to somehow re-inject it without being able to access the HA GUI…
2021-01-15 16:41:01 WARNING (MainThread) [homeassistant.config_entries] Config entry for shelly not ready yet. Retrying in 80 seconds,
[cont-finish.d] executing container finish scripts...,
[cont-finish.d] done.,
[s6-finish] waiting for services.,
s6-svscanctl: fatal: unable to control /var/run/s6/services: supervisor not listening,
[s6-finish] sending all processes the TERM signal.,
[s6-finish] sending all processes the KILL signal and exiting.,
[s6-init] making user provided files available at /var/run/s6/etc...exited 0.,
[s6-init] ensuring user provided files have correct perms...exited 0.,
[fix-attrs.d] applying ownership & permissions fixes...,
[fix-attrs.d] done.,
[cont-init.d] executing container initialization scripts...,
[cont-init.d] udev.sh: executing... ,
[18:10:49] INFO: Update udev information,
[cont-init.d] udev.sh: exited 0.,
[cont-init.d] done.,
[services.d] starting services,
[services.d] done.,
2021-01-15 18:10:51 WARNING (MainThread) [homeassistant.components.http] The 'base_url' option is deprecated, please remove it from your configuration,
2021-01-15 18:11:01 WARNING (MainThread) [homeassistant.setup] Setup of recorder is taking over 10 seconds.,
2021-01-15 18:11:02 WARNING (SyncWorker_5) [homeassistant.util.yaml.loader] YAML file /config/ip_bans.yaml contains duplicate key "192.168.2.1". Check lines 1 and 4,
2021-01-15 18:11:02,714 INFO roonapi -- Connecting to Roon server 192.168.2.49:9100,
2021-01-15 18:11:02 INFO (MainThread) [roonapi] Connecting to Roon server 192.168.2.49:9100,
2021-01-15 18:11:02,725 INFO roonapi -- Connection with roon websockets (re)created.,
2021-01-15 18:11:02,725 INFO roonapi -- Confirming previous registration with Roon...,
2021-01-15 18:11:02 INFO (Dummy-6) [roonapi] Connection with roon websockets (re)created.,
2021-01-15 18:11:02 INFO (Dummy-6) [roonapi] Confirming previous registration with Roon...,
2021-01-15 18:11:02,727 INFO roonapi -- Registered to Roon server Roon ROCK,
2021-01-15 18:11:02 INFO (Thread-3) [roonapi] Registered to Roon server Roon ROCK,
2021-01-15 18:11:02 ERROR (MainThread) [homeassistant.config] Invalid config for [automation]: required key not provided @ data['action'][0]['domain']. Got None,
required key not provided @ data['trigger'][0]['platform']. Got None. (See /config/configuration.yaml, line 9). ,
2021-01-15 18:11:02 ERROR (MainThread) [homeassistant.config] Invalid config for [automation]: Unexpected value for condition: 'None'. Expected numeric_state, state, sun, template, time, zone, and, or, not, device @ data['condition'][0]. Got None,
Unexpected value for condition: 'None'. Expected numeric_state, state, sun, template, time, zone, and, or, not, device @ data['condition'][1]. Got None. (See /config/configuration.yaml, line 9). ,
2021-01-15 18:11:02 ERROR (MainThread) [homeassistant.config] Invalid config for [automation]: extra keys not allowed @ data['action'][0]['brightness_pct']. Got None,
extra keys not allowed @ data['action'][0]['domain']. Got None,
extra keys not allowed @ data['action'][0]['type']. Got None,
required key not provided @ data['trigger'][2]['platform']. Got None. (See /config/configuration.yaml, line 9). ,
2021-01-15 18:11:06 WARNING (MainThread) [homeassistant.config_entries] Config entry for shelly not ready yet. Retrying in 5 seconds,
2021-01-15 18:11:06 WARNING (MainThread) [homeassistant.config_entries] Config entry for shelly not ready yet. Retrying in 5 seconds,
2021-01-15 18:11:14 WARNING (MainThread) [homeassistant.config_entries] Config entry for shelly not ready yet. Retrying in 10 seconds,
2021-01-15 18:11:14 WARNING (MainThread) [homeassistant.config_entries] Config entry for shelly not ready yet. Retrying in 10 seconds,
2021-01-15 18:11:27 WARNING (MainThread) [homeassistant.config_entries] Config entry for shelly not ready yet. Retrying in 20 seconds,
EDITED TO ADD: Interestingly, HA itself still seems to be working (lights going off & on according to the schedule), but I can’t access it / interact with it via the browser.