NetBSD 8 error: Failure to communicate with kernel device-mapper driver

[Wean Irdeh <wean.irdeh%gmail.com@localhost>]

I tried to create LVM, I have created PV and VG, but there's an error
when I tried to create LV as described from title. I have loaded the
dm kernel module earlier.
On NetBSD 8 installation shell booted from UEFI using GPT partition.

Any help is appreciated. Thanks a lot!