systemctl enable gdm3 failes

[cornelis d stravers]

root@mu-22-04:/home/kees# systemctl enable gdm3
Synchronizing state of gdm3.service with SysV service script with /lib/systemd/systemd-sysv-install.
Executing: /lib/systemd/systemd-sysv-install enable gdm3
The unit files have no installation config (WantedBy=, RequiredBy=, Also=,
Alias= settings in the [Install] section, and DefaultInstance= for template
units). This means they are not meant to be enabled using systemctl.

Possible reasons for having this kind of units are:
• A unit may be statically enabled by being symlinked from another unit's
  .wants/ or .requires/ directory.
• A unit's purpose may be to act as a helper for some other unit which has
  a requirement dependency on it.
• A unit may be started when needed via activation (socket, path, timer,
  D-Bus, udev, scripted systemctl call, ...).
• In case of template units, the unit is meant to be enabled with some
  instance name specified.

ProblemType: Bug
DistroRelease: Ubuntu 22.04
Package: systemctl (not installed)
ProcVersionSignature: Ubuntu 5.15.0-37.39-generic 5.15.35
Uname: Linux 5.15.0-37-generic x86_64
ApportVersion: 2.20.11-0ubuntu82.1
Architecture: amd64
CasperMD5CheckResult: pass
CurrentDesktop: X-Cinnamon
Date: Sun Jun 12 21:03:54 2022
InstallationDate: Installed on 2022-06-01 (11 days ago)
InstallationMedia: Ubuntu-MATE 22.04 LTS "Jammy Jellyfish" - Release amd64 (20220419)
ProcEnviron:
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LD_PRELOAD=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: docker-systemctl-replacement
UpgradeStatus: No upgrade log present (probably fresh install)