Hello,

This is more likely to be a Horizon bug than an issue with Kolla itself, since Kolla doesn't change much from the default configuration.

You should check Horizon logs in /var/log/kolla/horizon to find the error. I would also encourage you to upgrade to a more recent release, since Train has been marked as End of Life in Kolla recently.

Cheers,
Pierre Riteau (priteau)

On Fri, 9 Sept 2022 at 15:41, Albert Braden <ozzzo@yahoo.com> wrote:
We're running kolla train and we're seeing an apparent bug when we try to add or remove security groups on a port. We see error "Failed to update port <ID>". It works fine in CLI; we only see this in Horizon. Is this a known bug, or are we doing something wrong?