[systemd-devel] Failed to mount early API filesystems, freezing execution

[Esben Stien]

I have an old Ubuntu 16.04 that I upgraded and during the upgrade, it 
had a power failure.

Now I only see this when I boot:

failed to determine whether /sys is mount point
failed to mount early api filesystems, freezing execution

Here's a photo of the screen:

https://imgur.com/a/uPH7HTd

I've tried both targets:

systemd.unit=emergency.target
systemd.unit=rescue.target

, but I'm ending up the same place.

Is there any way to atleast get a shell?

I'm not sure what systemd service it's complaining about?

Any pointers as to what I can try?

Thanks;)