silliness getting to LMS settings page

Hello.

I'm having trouble browsing to the settings page of my LMS. I know this is actually likely to be a dumb network-y question, but I don't understand quite enough about networking. I thought maybe if the fix is glaringly obvious someone might share it with me.

I'm on Win10 with the latest LMS server installed (7.9.3). The computer I have LMS on is called "COLDBREW"

I can browse to coldbrew:9000 and play with the LMS server just fine.

When I click on the "Settings" icon at lower-right,

1. I get a "403 Forbidden: settings/index.html" error.
2. The address bar shows coldbrew:9000/settings/index.html?player=xxxx etc.

BUT, if I edit the address and replace "coldbrew" with either "localhost" or "127.0.0.1" [/B]or the actual IP of coldbrew, it works and I get to the settings page.

Any ideas? Any and all help is much appreciated.

Thanks,

Owen.

P.s. / FWIW - I checked that my puter DOES indeed know who it is by pinging localhost and seeing the response "Pinging coldbrew [::1] with 32 bytes of data" etc.

Finally: here's the relevant log entry from the error:

[20-05-24 17:55:30.1076] Slim::Web::HTTP::generateHTTPResponse (990) Access to settings pages is restricted to the local network or localhost: 169.254.57.70 -> 192.168.1.152 (settings/index.html)

From this it looks like maybe LMS thinks my external IP is 169.254.57.70?

1. It's not.
2. Why would my external IP be involved in letting me browse to a settings page on my local machine anyway?