oem-config-prepare shows wrong icon and label

artful desktop 20170823

During OEM configuration the icon on the desktop is incorrect (generic text file icon). cf screenshot

ProblemType: Bug
DistroRelease: Ubuntu 17.10
Package: ubiquity (not installed)
ProcVersionSignature: Ubuntu 4.12.0-11.12-generic 4.12.5
Uname: Linux 4.12.0-11-generic x86_64
ApportVersion: 2.20.6-0ubuntu6
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Wed Aug 23 15:19:45 2017
InstallationDate: Installed on 2013-09-03 (1449 days ago)
InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Alpha amd64 (20130902)
ProcEnviron:
 TERM=screen-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=fr_FR.UTF-8
 SHELL=/bin/bash
SourcePackage: ubiquity
UpgradeStatus: No upgrade log present (probably fresh install)