cloud-init 18.3 log snippet

.log

2020-01-07 18:32:01,974 - util.py[DEBUG]: Running module locale (<module 'cloudinit.config.cc_locale' from '/usr/lib/python3/dist-packages/cloudinit/config/cc_locale.py'>) failed
Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/cloudinit/stages.py", line 800, in _run_modules
    freq=freq)
  File "/usr/lib/python3/dist-packages/cloudinit/cloud.py", line 54, in run
    return self._runners.run(name, functor, args, freq, clear_on_fail)
  File "/usr/lib/python3/dist-packages/cloudinit/helpers.py", line 187, in run
    results = functor(*args)
  File "/usr/lib/python3/dist-packages/cloudinit/config/cc_locale.py", line 45, in handle
    cloud.distro.apply_locale(locale, locale_cfgfile)
  File "/usr/lib/python3/dist-packages/cloudinit/distros/debian.py", line 104, in apply_locale
    update_locale_conf(locale, out_fn, keyname=keyname)
  File "/usr/lib/python3/dist-packages/cloudinit/distros/debian.py", line 279, in update_locale_conf
    '%s=%s' % (keyname, locale)], capture=False)
  File "/usr/lib/python3/dist-packages/cloudinit/util.py", line 2027, in subp
    cmd=args)
cloudinit.util.ProcessExecutionError: Unexpected error while running command.
Command: ['update-locale', '--locale-file=/etc/default/locale', 'LANG=de_DE.UTF-8']
Exit code: 255
Reason: -
Stdout: -
Stderr: -