I think I’m in the same boat as well. On my TCL 65R625 television, when I try to look at my local media stored on my Asustor 5200T NAS, I get a big screen saying my NAS is currently unavailable. The Console on https://app.plex.tv (where I can see my local media just fine) says:
“plaintext connection from [::ffff:192.168.1.148]:60702 rejected because secure connections are required”
when I try to access that. However, I can log onto my NAS without issue via my browser.
If I try launching the Plex Media Server app from my NAS’ page, the browser tab it opens says:
“# The connection to 192.168.1.2 is not secure”
That address is my NAS where I’m happily logged in with https. If I tell that page to continue anyway, it says the page isn’t working and that console window says:
“plaintext connection from [::ffff:192.168.1.182]:51025 rejected because secure connections are required”
If I click on the View Site Information area of the browser’s URL bar, it says:
“Certificate is not valid”
If I click on that message, the certificate appears ok, was issued from “R3, Let’s Encrypt, US” and is valid from 01/05/202 to 04/05/2022.
There doesn’t appear to be any problem at my pfSense box’s level.
I have not set Plex up to be accessed remotely. This is just local across my local network.
Looking at Plex Media Server.log, I see:
“CERT: incomplete TLS handshake from [::ffff:192.168.1.182]:51030: sslv3 alert certificate unknown”
I’ve attached the whole zip file of logs.
Everything’s been updated, shut down and rebooted repeatedly.
Plex Media Server Logs_2022-01-13_12-44-14.zip (803.3 KB)