package libxau6:i386 1:1.0.8-1 failed to install/upgrade: package libxau6:i386 is already installed and configured

[BJC2014]

tried to install plugins but got this error, the error repeats itself constantly.

ProblemType: Package
DistroRelease: Ubuntu 16.04
Package: libxau6:i386 1:1.0.8-1
ProcVersionSignature: Ubuntu 4.8.0-36.36~16.04.1-generic 4.8.11
Uname: Linux 4.8.0-36-generic x86_64
.tmp.unity_support_test.0:

ApportVersion: 2.20.1-0ubuntu2.5
AptdaemonVersion: 1.1.1+bzr982-0ubuntu14
Architecture: amd64
CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
CompositorRunning: compiz
CompositorUnredirectDriverBlacklist: '(nouveau|Intel).*Mesa 8.0'
CompositorUnredirectFSW: true
Date: Thu Jun 22 19:41:10 2017
Dependencies:
 gcc-6-base 6.0.1-0ubuntu1
 libc6 2.23-0ubuntu9
 libgcc1 1:6.0.1-0ubuntu1
 multiarch-support 2.23-0ubuntu5
DistUpgraded: Fresh install
DistroCodename: xenial
DistroVariant: ubuntu
DuplicateSignature:
 package:libxau6:i386:1:1.0.8-1
 Processing triggers for libc-bin (2.23-0ubuntu5) ...
 dpkg: error processing package libjson-c2:i386 (--configure):
  package libjson-c2:i386 is already installed and configured
ErrorMessage: package libxau6:i386 is already installed and configured
GraphicsCard:
 Advanced Micro Devices, Inc. [AMD/ATI] RV530 [Radeon X1600 XT/X1650 GTO] [1002:71c0] (prog-if 00 [VGA controller])
   Subsystem: Micro-Star International Co., Ltd. [MSI] RV530 [Radeon X1600 XT/X1650 GTO] [1462:0430]
   Subsystem: Micro-Star International Co., Ltd. [MSI] RV530 [Radeon X1600] (Secondary) [1462:0431]
InstallationDate: Installed on 2017-06-22 (0 days ago)
InstallationMedia: Ubuntu 16.04.2 LTS "Xenial Xerus" - Release amd64 (20170215.2)
PackageArchitecture: i386
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.8.0-36-generic root=UUID=8309fccf-032b-443d-8765-b2b7736c47f8 ro quiet splash vt.handoff=7
RelatedPackageVersions:
 dpkg 1.18.4ubuntu1.1
 apt 1.2.19
SourcePackage: dpkg
Title: package libxau6:i386 1:1.0.8-1 failed to install/upgrade: package libxau6:i386 is already installed and configured
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 03/18/2010
dmi.bios.vendor: Intel Corp.
dmi.bios.version: PRG3110H.86A.0071.2010.0318.1704
dmi.board.asset.tag: To be filled by O.E.M.
dmi.board.name: DG31PR
dmi.board.vendor: Intel Corporation
dmi.board.version: AAD97573-305
dmi.chassis.type: 3
dmi.modalias: dmi:bvnIntelCorp.:bvrPRG3110H.86A.0071.2010.0318.1704:bd03/18/2010:svn:pn:pvr:rvnIntelCorporation:rnDG31PR:rvrAAD97573-305:cvn:ct3:cvr:
version.compiz: compiz 1:0.9.12.2+16.04.20160823-0ubuntu1
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.70-1~ubuntu16.04.1
version.libgl1-mesa-dri: libgl1-mesa-dri 12.0.6-0ubuntu0.16.04.1
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 12.0.6-0ubuntu0.16.04.1
version.xserver-xorg-core: xserver-xorg-core N/A
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
version.xserver-xorg-video-ati: xserver-xorg-video-ati N/A
version.xserver-xorg-video-intel: xserver-xorg-video-intel N/A
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau N/A
xserver.bootTime: Thu Jun 22 19:36:37 2017
xserver.configfile: default
xserver.devices:
 input Power Button KEYBOARD, id 6
 input Power Button KEYBOARD, id 7
 input Sleep Button KEYBOARD, id 8
 input Logitech K400 KEYBOARD, id 9
xserver.errors:

xserver.logfile: /var/log/Xorg.0.log
xserver.outputs: Output DVI-0 DVI-1 S-video
xserver.version: 2:1.18.4-1ubuntu6.1~16.04.1
xserver.video_driver: radeon

[BJC2014 (bjclaasen)]

The errors have stopped after this.