In your rabbitmq-server error log attached you can see the following:
Error during startup:
{error,{could_not_start_listener,"::",5672,eaddrinuse}}
Which means you already have something using port 5672 and rabbitmq-
server is trying to use that port. You can stop whatever service is
running in this port and restart rabbitmq-server or configure rabbitmq-
server to run in a different port.
Since it seems likely to me that this is a local configuration problem,
rather than a bug in Ubuntu, I am marking this bug as 'Incomplete'.
However, if you believe that this is really a bug in Ubuntu, then we would
be grateful if you would provide a more complete description of the problem
with steps to reproduce, explain why you believe this is a bug in Ubuntu
rather than a problem specific to your system, and then change the bug
status back to "New".
For local configuration issues, you can find assistance here:
http://www.ubuntu.com/support/community
** Changed in: rabbitmq-server (Ubuntu)
Status: New => Incomplete
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https://bugs.launchpad.net/bugs/1934696
Title:
package rabbitmq-server 3.8.9-2ubuntu0.1 failed to install/upgrade:
»installiertes rabbitmq-server-Skript des Paketes post-
installation«-Unterprozess gab den Fehlerwert 1 zurück
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