Curious messages from dnf

[Robert McBroom]

Get the following at the end of "dnf update" of f41

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> > > Running trigger-install scriptlet: systemd-0:256.12-1.fc41.x86_64
> > > Finished trigger-install scriptlet: systemd-0:256.12-1.fc41.x86_64
> > > Scriptlet output:
> > > Failed to connect to user scope bus via machine transport: No

medium found
> > > Failed to connect to user scope bus via machine transport: No

medium found
> > > Running trigger-post-uninstall scriptlet:

systemd-0:256.12-1.fc41.x86_64
> > > Finished trigger-post-uninstall scriptlet:

systemd-0:256.12-1.fc41.x86_64
> > > Scriptlet output:
> > > Failed to connect to user scope bus via machine transport: No

medium found
> > > Running trigger-post-uninstall scriptlet:

systemd-0:256.12-1.fc41.x86_64
> > > Finished trigger-post-uninstall scriptlet:

systemd-0:256.12-1.fc41.x86_64
> > > Scriptlet output:
> > > Failed to connect to user scope bus via machine transport: No

medium found
> > >

Complete!

--------------------

what is

user scope bus via machine transport:

???