Sorry for the spam; I also noticed that there was an "Internal server error" reported when you tried to add the cluster interface via the CLI.
Can you check for a corresponding exception in /var/log/maas/regiond.log, and attach it to this bug?
Sorry for the spam; I also noticed that there was an "Internal server error" reported when you tried to add the cluster interface via the CLI.
Can you check for a corresponding exception in /var/log/ maas/regiond. log, and attach it to this bug?