Docker can't pull image

I have docker and portainer (from omv-extras) installed on my omv and they are running my containers fine.

But I'm unable to update my images, I always get connection refused error:

Get "https://lscr.io/v2/": dial tcp: lookup lscr.io on [::1]:53: read udp [::1]:56187->[::1]:53: read: connection refused

Some googling suggest that it is some kind of DNS issue, but I'm not sure what is the problem. Is this error familiar to anyone or know what to do? Do I need to forward some port on my router or set up smething between the portainer and omv?

Note: BTW I'm also running wireguard and duckDNS from a container and accessing the server through VPN in case that has any effect.

Ok, it seems like the issue was that omv didn't recognize the network interface automatically, so I had to add manually the interface under "System->Network->Interfaces" and after that it works fine.