Help getting WebFinger plugin to work

I have just set up a wordpress website and I need a webfinger to work on it. I added the webfinger plugin, but on webfinger.net I still get an “Error getting JRD: 404 Not Found” Is there other settings I need to set up or something that is blocking it from accessing the information? I am trying to set up a tailscale account with a custom domain but it needs a webfinger verification. Here is more info on that, https://tailscale.com/kb/1240/sso-custom-oidc/#requirements Thanks!

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