Unable to boot after upgrade to HAOS 12.2

[hahuzar]

The problem is also reported here:

OS 12.2 upgrade left HA on grub menu, unbootable

Hi, I’m using this section as I believe it’s the most appropriate I clicked to upgrade to the latest HAOS (12.2) about 30’ ago. Never came back up. On plugging a screen and keyboard, I saw it was stuck on the grub boot menu tried all entries manually. Tried power cycling, and did the same again. It is not booting saying “error loading image” or something like that for entries A&B and nothing, just coming back to menu for the other 2 entries. how do I fix this ? I’m not keen on reinstalli…