I think we would need more information to know what’s wrong. Do you get an error like 404 when loading an avatar? What’s your reverse proxy config look like?
I will take a guess based on what I have seen happen before. Avatars should be at /media/avatars on your domain name. I assume you are using “seafile.example.com” to stand in for you domain. So that part looks right, but if they aren’t loading, my first suspicion would be some left-over config from before you upgraded.
The instructions used to include this extra section for taking a shortcut to get straight to the avatars without going through seafile:
That’s not going to work anymore since your reverse proxy can’t access the files inside of the docker container. So if you have that section in your reverse proxy config, remove it.