Sounds like there's something wrong with your setup. I just disabled authentication in my config file and got the expected result. I copy/pasted the snippet below so just double check that's what yours looks like. I also don't have to login every time (except after a container restart) when auth is enabled as long as I check off the remember me box.

web:
  authentication:
    disabled: true

It likely also needs an ip address range to determine what is "local" for you. Is it 192.168.1.0\24, 10.0.0.0\24 or something else. Unsure what that flag would be though for slskd.

The joke with my comment was that you give little to no context. For better advice and help giving some context may be beneficial.