Plex: XML data screen when IP Range is set for "List of IP addresses and networks that are allowed without auth" for access when Internet is down

Apps and Virtualization
1

Here is an interesting case. What I want to do is configure my Plex instance so that, if I lose Internet connectivity, I can still use my local clients (Roku TV, Android phone and tablet, web page) to access my locally stored media. Per How to Use Plex Media Server Without Internet Access , I have to set my local IP range which I did as so:

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After I set that, when I use http://192.168.1.2:32400, I see the following screen instead of a redirect to the Plex interface:

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But, when I go to http://192.168.1.2:32400/web/ and/or https://app.plex.tv/ , the interface comes up as expected.

Is this normal behavior?