SOLVED: Horde Installation bricht ab mit "Insufficient access (50)"

Ich versuche, Horde 5.2.17-4 aus dem Appcenter auf ein UCS 4.4-3 errata482 zu installieren. Leider schlägt die Installation fehl.

Der Thread UCS Member - App Installation -> Insufficient access (50) bringt leider nichts, eine andere Docker-basierte App (Dudle) lässt sich problemlos installieren.

Ideen, was da schief gehen könnte?

Hier die Liste der Warnungen aus appcenter.log:

  5916 docker.configure.container.9d37  20-03-15 10:08:08 [   DEBUG]: Calling docker exec -u root 9d37a125d43a9376c720ddf1623add4dbd396b6e995a19335604d1e92a8e3ecb ucr unset horde/log/priority horde/mailer/params/host horde/imap/hostspec horde/problems/mail horde/auth/admins
  5916 docker.configure.container.9d37  20-03-15 10:08:09 [ WARNING]: W: The config registry variable 'horde/log/priority' does not exist
  5916 docker.configure.container.9d37  20-03-15 10:08:09 [ WARNING]: W: The config registry variable 'horde/mailer/params/host' does not exist
  5916 docker.configure.container.9d37  20-03-15 10:08:09 [ WARNING]: W: The config registry variable 'horde/imap/hostspec' does not exist
  5916 docker.configure.container.9d37  20-03-15 10:08:09 [ WARNING]: W: The config registry variable 'horde/problems/mail' does not exist
  5916 docker.configure.container.9d37  20-03-15 10:08:09 [ WARNING]: W: The config registry variable 'horde/auth/admins' does not exist
...
  5916 actions.install.container.9d37   20-03-15 10:08:21 [    INFO]: File: /etc/logrotate.d/univention-config-registry-replog
  5916 actions.install.container.9d37   20-03-15 10:08:28 [ WARNING]: RTNETLINK answers: Operation not permitted
  5916 actions.install.container.9d37   20-03-15 10:08:28 [ WARNING]: ifup: failed to bring up lo
  5916 actions.install.container.9d37   20-03-15 10:08:30 [    INFO]: File: /etc/security/access-chsh.conFile: /etc/dhcp/dhclient.conf
  5916 actions.install.container.9d37   20-03-15 10:08:30 [ WARNING]: RTNETLINK answers: Operation not permitted
  5916 actions.install.container.9d37   20-03-15 10:08:30 [ WARNING]: ifup: failed to bring up eth0
  5916 actions.install.container.9d37   20-03-15 10:08:34 [    INFO]: Generating locales (this might take a while)...
  5916 actions.install.container.9d37   20-03-15 10:08:34 [ WARNING]: locale alias file `/usr/share/locale/locale.alias' not found: No such file or directory
  5916 actions.install.container.9d37   20-03-15 10:08:34 [    INFO]:   de_DE.UTF-8... done
  5916 actions.install.container.9d37   20-03-15 10:08:35 [ WARNING]: locale alias file `/usr/share/locale/locale.alias' not found: No such file or directory
  5916 actions.install.container.9d37   20-03-15 10:08:35 [    INFO]:   en_US.UTF-8... done
  5916 actions.install.container.9d37   20-03-15 10:08:35 [    INFO]: Generation complete.
  5916 actions.install.container.9d37   20-03-15 10:10:41 [    INFO]: f
  5916 actions.install.container.9d37   20-03-15 10:10:41 [    INFO]: Multifile: /etc/postfix/ldap.virtual
...
  5916 actions.install.container.9d37   20-03-15 10:10:42 [    INFO]: Running join scripts
  5916 actions.install.container.9d37   20-03-15 10:10:42 [ WARNING]: Warning: Permanently added 'ileapp01.ile-ostalb.de,192.168.178.220' (ECDSA) to the list of known hosts.
  5916 actions.install.container.9d37   20-03-15 10:10:44 [ WARNING]: ldap_sasl_bind(SIMPLE): Can't contact LDAP server (-1)
  5916 actions.install.container.9d37   20-03-15 10:10:44 [ WARNING]: Insufficient access (50)
  5916 actions.install.container.9d37   20-03-15 10:10:45 [    INFO]: Search LDAP binddn
  5916 actions.install.container.9d37   20-03-15 10:10:45 [    INFO]:
  5916 actions.install.container.9d37   20-03-15 10:10:45 [    INFO]: **************************************************************************
  5916 actions.install.container.9d37   20-03-15 10:10:45 [    INFO]: * Running join scripts failed!                                           *
  5916 actions.install.container.9d37   20-03-15 10:10:45 [    INFO]: **************************************************************************
  5916 actions.install.container.9d37   20-03-15 10:10:45 [    INFO]: * Message:  binddn for user rainer not found
  5916 actions.install.container.9d37   20-03-15 10:10:45 [    INFO]: **************************************************************************
  5916 actions.install.container.9d37   20-03-15 10:10:45 [ WARNING]: Something went wrong while running join scripts
  5916 actions.install.container.9d37   20-03-15 10:10:45 [CRITICAL]: Something went wrong while running join scripts

  5916 packages                         20-03-15 10:10:45 [   DEBUG]: Releasing LOCK
  5916 actions.install                  20-03-15 10:10:45 [CRITICAL]: Setup script failed!
  5916 actions.install                  20-03-15 10:10:45 [ WARNING]: Aborting...
  5916 actions.remove                   20-03-15 10:10:45 [   DEBUG]: Calling remove
  5916 actions.remove.progress          20-03-15 10:10:45 [   DEBUG]: 0
  5916 actions.remove                   20-03-15 10:10:45 [    INFO]: Going to remove Horde Groupware Webmail Edition (5.2.17-4)

Das Problem waren anscheinend alte Daten, die noch von einer früheren Installation in /var/lib/univention-appcenter/apps/horde oder /usr/share/univention-appcenter/apps/horde lagen. Nachdem ich diese gelöscht hatte, ließ sich Horde installieren.