Unable to use gkdebconf on Wayland session

[Norbert]

Steps to reproduce:
1. Install Ubuntu 17.10.
2. Install gkdebconf package
3. Try to use gkdebconf
4. Click on any package inside "Select package" group, click "Configure".
5. Get error message

Failed to run /usr/sbin/dpkg-reconfigure -fgnome unattended-upgrades as user root.

Unable to copy the user's Xauthorization file.

Expected results:
User is able to use gkdebconf as root

Actual results:
User is unable to use gkdebconf as root

ProblemType: Bug
DistroRelease: Ubuntu 17.10
Package: gkdebconf 1.2.68ubuntu2
ProcVersionSignature: Ubuntu 4.12.0-11.12-generic 4.12.5
Uname: Linux 4.12.0-11-generic i686
ApportVersion: 2.20.6-0ubuntu7
Architecture: i386
CurrentDesktop: GNOME
Date: Sun Aug 27 14:47:31 2017
InstallationDate: Installed on 2017-08-26 (0 days ago)
InstallationMedia: Ubuntu 17.10 "Artful Aardvark" - Alpha i386 (20170826)
SourcePackage: gkdebconf
UpgradeStatus: No upgrade log present (probably fresh install)