No ZFS pools located, can't boot

[zeiz]

I have CURRENT with tons of stuff on ZFS (entire drive).
I was out of this computer for a while and today I couldn't boot and saw just this:
"No ZFS pools located, can't boot"
Looks like something important has evaporated...
I read about v14 update and same problem but I don't remember I did such update.
Anyway I tried what's recommended there but without success.

What actually could happen? How to revive the installation?

Would appreciate if any method exists for fixing this problem.

 

[zeiz]

Well, I revived the installation.
I tried many things but probably this helped: in fixit mode kldload opensolaris.ko and zfs.ko then zpool import my pool.