bug: NETWORKERROR on fresh install using non-standard port

[Velikyi]

What happened?

On a fresh install on W11, without touching anything and using local, everything seems to work. When I try to follow the documentation for non-standard port by changing 80:80 to 1234:80, and changing caddy hostname to :80, and then try creating a new user or logging in with the previously made user, it returns NETWORKERROR. I noticed the documentation telling me to check the config before posting issue, but to my knowledge I'm doing exactly what the documentation says, so I don't understand what I'm supposed to check or do differently. Any help?