Plex stopped working suddenly on my LG TV

On August 29, 2024, Plex suddenly stopped working on my LG 55LA965V (2013 model). I was watching a movie, paused it for a while, and when I returned, it didn’t work.

The TV says:

“Plex is not reachable. Make sure your server and device have internet connections, and any firewalls or other programs are set to allow access.”

The problem is that it was working perfectly before. I run my Plex server on my Synology NAS, and I can access it from any other device (smartphone, tablet, computer), so it definitely has an internet connection. I can also access files from the TV via DLNA, so the TV apparently has an internet connection as well.

Do you have any suggestions on how to get it working again?

(Reinstalling Plex application on my LG TV was the first thing I did and it didn’t help.)

Thanks.

https://support.plex.tv/articles/204080173-which-smart-tv-models-are-supported/

DLNA has nothing to do with the internet.

Hi, thanks for the quick reply. So are you saying that there was some change on Plex’s part on that particular day?
If the TV didn’t have an internet connection, I wouldn’t be able to stream movies via DLNA.

I’m not saying that. I don’t know whether that was the case.
Verify that your TV is still in the supported group of devices via the link I gave you above.

Well, it apparently was supported three days ago as it was working perfectly. I am trying to find out what happened.

Have you read the blue text box in the link?

Note: Due to root certificate limitations with the device OS itself, only webOS 5.0+ devices support secure connections with a personal Plex Media Server. To allow connections to a personal server, devices running earlier webOS versions must be set to Allow Insecure Connections in the TV app settings and the Plex Media Server must be set to Preferred for the Secure Connections preference

I do have Plex Media Server set to Preferred. I’m having trouble saving the new settings on the TV. Whenever I exit the settings and come back, the default values are there.
Retry button just keeps returning me to the same screen, Go Home and Sign in buttons do not work at all.

Hi OttoKerner

I to have had this stop working, when I try to set the app to “Allow Insecure Connections” it doesn’t save this setting.

Plex for LG Version 3.13.29

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Seems like we have the same problem. What TV do you have?

LG 40UB800T-TB 40" TV (purchased 2015)
Software version 4.11.52

And when did it stop working for you?

about the same time as for you. I have a feeling that Plex have changed something on there end which has disabled these “older” TVs.

I use chrome cast on other tv’s but is is such a bad experience compared to the built in app.
The plex app disconnects all the time from the chrome cast and stops playing on the tv and starts playing on the casting device. I really hope they fix this issue soon.

Here are the screenshots:



The settings do not allow to save changes anywhere.

Mine s exactly the same. Maybe if they don’t want to support it they could release and update where “Allow Fallback to Insecure Connections” is set to “preferred” or “Always” by default should be a super simple fix.

Well, that’s exactly what I think. I know that there was no change on my end, either on the TV or the Plex server, and suddenly it stopped working.

I’m having the exact same problem on my LG since last night. Your screenshots look identical.

It seems that the problem is on Plex’s side. So let’s hope they’ll fix the issue soon and won’t tell us that we need to buy a new TV.

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Same issue here on a LG32LN575V TV, which was triggered on the 29th. I’ve been through all the recommended advice about ports, firewalls etc. Nothing resolves it. Tried to access the server on another device via the web (a device on the same wifi network as the server and LG TV) and it connects without problem so the issue is not the server - it’s specifically this app on older model LG TVs. Any solution from the people from Plex here?

Server Version#: 4.129.1
Player Version#: LG app on

Hi,

I’m working on the infrastructure side at Plex.
Thanks for your reports, we made a change on our infra on the 29th to modernize our stack. I think I have an idea what is currently blocking your access, I’ll try to have something ready to test tomorrow.
To help confirm my theory and try to help quickly as I can, would one of you could provide a tcpdump/pcap of the traffic of your TV ? (sorry I know it’s not a trivial thing to do, but if anyone can provide that, that could help me fix it).

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I’m also working with @lotooo to help troubleshoot. You can capture the traffic by piping tcpdump on the router to Wireshark and then filtering the traffic from there. For example, using a Unifi router with Wireshark running on a Mac you can use something like this

ssh <user>@<router-ip> 'sudo /usr/sbin/tcpdump -f -i any -w -' | /Applications/Wireshark.app/Contents/MacOS/Wireshark -k -i -