OH3: installing Snapshot release; error performing post-update tasks

  • Platform information:
    • Hardware: Odroid XU4
    • OS: Ubuntu 20.04
    • Java Runtime Environment: 11
    • openHAB version: OH Snapshot release

I always need two attempts to install the newest OH3 snapshot release on my odroid.
When I try to do an update it always says:

dpkg: Fehler beim Bearbeiten des Paketes openhab (--configure):
 »installiertes openhab-Skript des Paketes post-installation«-Unterprozess gab den Fehlerwert 1 zurück
Trigger für systemd (245.4-4ubuntu3.3) werden verarbeitet ...
Fehler traten auf beim Bearbeiten von:
E: Sub-process /usr/bin/dpkg returned an error code (1)

Then I start the installation again and there are no errors and the installation is working.
I added the messages in the console here:

frist attempt.txt (4.8 KB) second attempt.txt (764 Bytes)

Do you have an idea? Ther seems to be similar problems in the past:

This issue only occurs when openHAB is running. If you stop it before upgrading, there will be no error.

uh, I thought I tried this before. Thank you.