20.04 Installer errors out (Unspecified) when installing ZFS

[Gene]

Installing 20.04 from DVD. Installed on Dell mini-tower, 1 TB drives. Was offered and used installer update and installed OK with ZFS.

Tried to install on desktop with Gigabyte GA-78LMT-USB3 mother board, 8 GB RAM, 2 3 TB drives. Can install if ZFS is not selected. If ZFS IS selected, installer errors out after the time zone is selected.

Tested and verified memory, CPU, and drives; no problems found.

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: ubiquity 20.04.15
ProcVersionSignature: Ubuntu 5.4.0-26.30-generic 5.4.30
Uname: Linux 5.4.0-26-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
ApportVersion: 2.20.11-0ubuntu27
Architecture: amd64
CasperMD5CheckResult: skip
CasperVersion: 1.445
Date: Wed May 20 16:35:25 2020
InstallCmdLine: file=/cdrom/preseed/ubuntu.seed initrd=/casper/initrd quiet splash --- maybe-ubiquity
LiveMediaBuild: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423)
SourcePackage: ubiquity
UpgradeStatus: No upgrade log present (probably fresh install)