After a couple of failures with the installation of Core 2021.12.3, I had a successful installation or so I thought.
The frontend commenced startup actions and got through a couple such as automation. However, it then got stuck with the standard "startup not all features will be available " message.
It got no further. I restarted the browser and Home Assistant app but these just had the Data Loading page. After an hour or so, i hard rebooted the host raspberry pi4 but the result is the same… Data Loading.
I know that the basic elements are working, even if I cannot access the frontend, as HA automations are working in the house.
Unsure what to do. If it is the Core update that caused the issue, is there a way, perhaps via ssh, to fix just that?
Other option is restore from a backup. I do have backups on my Google drive as a result of recent HA updates but would need advice on that too. HA is on a raspberry pi4 and all software is up to date.
If I had to work with the micro sd card, I would be using a Windows laptop.
Update: Refreshed and recreated system using backup yamls that helped. Hopefully, as this is a version that has little tampering, should be more stable.