VirtualBox Regression: Missing Devices On Guest

[mfv]

Hello,

I have been using WindowsXP with SP3 as a guest within VirtualBox on a
FreeBSD host for many years.  However, some time ago I lost the
capability to produce any sound and then after awhile when I needed to
use the DVD discovered that it too no longer worked.  Both sound and
CD/DVD operate properly in native mode on FreeBSD amd64 r12.1p6.
The version of VirtualBox is 5.2.34.

I am able to attach the DVD to the VM but it crashes when I start it
and gives the following Result Code: NS_ERROR_FAILURE  (0x80004005)

I have doubled checked the permissions as specified in the installation
message as well as the FreeBSD Handbook.

I have searched the web for a solution but have not found anything that
works.  The very same issue was recorded against ticket number18211 on
the VirtualBox website.  Their response was to state that "FreeBSD in
not an officially supported host.  Please report this to the FreeBSD
port maintainers".  This user's version of VirtualBox was v5.2.22

Any help will be appreciated.

With thanks,

Marek