Plex Web on Chrome cannot access server at localhost

Server Version#: PMS for Windows v1.15.1.710
Player Version#: Plex Web v3.83.1

Localhost server is hidden/unavailable (hidden from the ser when accessing 127.0.0.1 via Plex Web from Google Chrome. app.plex.tv works fine on Chrome. 127.0.0.1 and app.plex.tv works fine on Firefox. EDIT: Actually, Firefox often can’t access the server via localhost either.

Can anyone tell me what is causing this?
EDIT: Logs attached.
Plex Media Server Logs_2019-03-06_14-53-47.zip (824.3 KB)

are you using https

Secure Connections is set to “Preferred”. Attempts to access https://127.0.0.1:32400 error in either browser as insecure.

a browser error or in the app? if browser the there should be an option to proceed anyway.

Turns out it’s a problem with an invalid certificate. Both Chrome and Firefox complain when trying to access https://localhost (see below).

Also, clicking the system tray icon opens Plex Web in http, not https.

That is the intended action. If you are within your own network, you should know and trust your own devices. You cannot obtain a valid SSL certificate for an internal ip address / localhost / servername. Thus, you are directed at http and not https.

See here for more information: https://www.globalsign.com/en/blog/certificates-for-internal-servers/

And yet, navigating to Plex Web via localhost still hides the host server, but accessing it via app.plex.tv does not.

So, the problem still remains. The only way to access Plex Web on that server, from itself, is via app.plex.tv. And I am not sure how to fix this.

Are you using any browser extensions?

No, I disabled them all before attempting this, and it did not have an effect.

I would think the logs should say why it’s not connecting.

I uninstalled Plex and downgraded to the latest “Public” version of PMS (v1.14.1.5488), and it fixed it.

Apparently there’s something wrong with the Web client embedded in the v1.15.1.710 beta build.

I don’t know what this means. what do you actually see. can you take a screenshot.

I downgraded to v1.14.1.5488, and it fixed the problem, so I can’t screenshot it (unless I break it again on purpose). But effectively what was happening was: my Dad, whose account has two servers—one at home and one at the lake—was trying to connect to his home Plex server via the Web client on localhost, and it only showed the server at the lake. It didn’t show the local(host) server at his house at all in Chrome. When I investgated, I found that the localhost server was not in the list of servers at all, and when I accessed the “Sharing” settings, it showed the local server listed there but as “unavailable”.

Somehow, I got Firefox to connect to it properly yesterday, but today he told me today that he also had problems in Firefox. Keeping in mind, he never uses app.plex.tv, so he wasn’t aware of that option. Anyway, I tried again today, and I also had problems using Firefox to get the Web client on localhost at his house to connect. And yet app.plex.tv worked as it should.

But as I said, I downgraded to the latest stable build and it fixed it.

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