cannot pull image from docker hub

I am running omv 5 verssion 5.1.2-1 (USUL)
Raspberry pi 4b 4g
I cannot seem to to download images now. I've tried from Image section I Portainer and from the Container section.
From the Image section I get no such image...:latest which I've seen before.
From the container side I get :Failure
Get https://registry-1.docker.io/v2/: dial tcp: lookup registry-1.docker.io on 1.1.1.1:53: read udp 172.21.20.147:52397->1.1.1.1:53: i/o timeout
I've tried rebooting which doesn't help. I have downloaded 4 other images prior to this but all of a sudden no luck.
Any ideas?
Thanks

yes I have etc0. I thin my problem was in Transmission container. When I disabled it I was able to download images again. The container was not set to bridge.
My new problem is where can I add extra arguments in Portainer? I need to add ports and "network=mynet"
Thanks

that worked for me. the last problem I have is adding ports. when I add a port manually, I get this error:409: Conflict

Your request had an invalid session-id header.
To fix this, follow these steps:

• When reading a response, get its X-Transmission-Session-Id header and remember it
• Add the updated header to your outgoing requests
• When you get this 409 error message, resend your request with the updated header

This requirement has been added to help prevent CSRF attacks.
X-Transmission-Session-Id: DdHUI3kKZuoDBKi2lviHBf3iYgewTeLo72U6q0Ry7ZRa2Gaw

in omv4 I would add the ports in the extra arguments. do you have any idea where or how I would add them.

thanks for your help

I tried not entering the port but was unable to connect to webpage. in the docker file it looks like the port would be published but I guess it's not the case

I tried that, but I get 409: Conflict

Your request had an invalid session-id header.
To fix this, follow these steps:

• When reading a response, get its X-Transmission-Session-Id header and remember it
• Add the updated header to your outgoing requests
• When you get this 409 error message, resend your request with the updated header

This requirement has been added to help prevent CSRF attacks.
X-Transmission-Session-Id: sRxjKy3o5244isq12KnAXCpeCloIQAwJKP2OvxVdjck03pTCup

when I go to myipaddress:9091