[BRLTTY] polkit_authority_check_authorization_sync error

[Chevelle]

Hello, I have a Debian test system.  No Braille display is currently 
connected.  It fills the journal with this error:

Jul 30 17:26:54 tiny brltty[567]: brltty: 
polkit_authority_check_authorization_sync error: 
GDBus.Error:org.freedesktop.PolicyKit1.Error.Failed: Process not found
Jul 30 17:26:55 tiny brltty[567]: 
polkit_authority_check_authorization_sync error: 
GDBus.Error:org.freedesktop.PolicyKit1.Error.Failed: Process not found
Jul 30 17:26:55 tiny brltty[567]: brltty: 
polkit_authority_check_authorization_sync error: 
GDBus.Error:org.freedesktop.PolicyKit1.Error.Failed: Process not found

Package: brltty
Version: 6.7-3.1
Priority: optional
Section: admin
Maintainer: Debian Accessibility Team 
<pkg-a11y-devel at alioth-lists.debian.net>
Is there something I should install?

Thanks.