"Failed to open session"

[penguinpwr]

The error message reads
"Failed to open a session for the virtual machine Windows"

4.19.0-11-amd64 #1 SMP Debian 4.19.146-1 (2020-09-17) x86_64 GNU/Linux
VirtualBox Version 6.1.4 r136177 (Qt5.11.3)

~/Downloads/Win10_1909_English_x64.iso

setup parameters:
System:
base memory 6144 MB
boot order: Optical, Hard Disk
Storage:
SATA port 0: Windows.vdi (Normal, 32.00 GB)
SATA port 1: (Optical Drive) Win10_1909_English_x64.iso (5.05 GB)

Something simple that I am missing?