I just update to OMV 4.x, and i was facing an issue from nginx website config.
I have sites defined as name based server all listen to 443 with force https option. This config works for years on OMV 3.x, event 2.x.
But since the update, nginx won't start with address already in use error. and i firure out that error is because of this configuration.
It seems that the nginx mkconf use an old config syntax, now deprecated.
By editing the zzz-omv-nginx and comment the ipv4 listen directive, it works like a charm
Have you experience the same thing ?
May I make a git issue ?