Ubuntu - error: attempt to read or write outside of disk 'hd0'

[ZFS_Ron]

SeaBIOS (version rel-1.16.2-0-gealb?a0?3390-prebuilt.qemu.org) Machine UUID ____________ error: attempt to read or write outside of disk 'hd0' Entering rescue mode... grub rescue>

VM=Ubuntu

This is my first Proxmox VM. What went wrong?
I am using ZFS on a fresh install.
Thanks

 

[ZFS_Ron]

M.2 Main OS
3 HDD in ZFS where the VM is.

 

[leesteken]

Did you switch the VM from OVMF to SeaBIOS after installation? Did you resize the virtual disk? Did you run a scrub on the ZFS pool where the virtual disk resides? Did you use thin provisioning and is the pool 100% full?

 

[ZFS_Ron]

I did not switch the VM from OVMF to SeaBIOS after installation.
I did not resize the Disk as it was a new install.
I don't know what scrubing the ZFS pool means. I did not run commands. Maybe Proxmox did something?
I don't know what thin provisioning is.
The pool is brand new and has lots of space. It is 15TB. Their are no other things being stored as this is a fresh proxmox install.