HI, I want to upgrade core 2020.12.1 and it failed. Unable to upgrade.
This happened on my NUC windows 10 / virtualbox too.
Strangely, when I looked at the system tab, I was changed to
2020.12.7, and I could use the blueprint system.
Check your disk space.
I have a SSD 120Gb and only HassOS.
Then ssh in to the host (not the HA container)
and issue a
docker pull homeassistant/raspberrypi4-64-homeassistant:2020.12.1
Post the error message