Connection to PLEX server lost

Plex Media Server NAS & Devices
1

Server Version#:
Player Version#:1.41.7.9823-59f304c16
Hello,
I’m newbie, french and an old man, so apologize for my english.
Since 5 june, I encountered problems on my PLEX installed on a QNAP NAS TS-453D.
All worked fine on Philips Google TV, Fire TV stick, … and now PMS seems unreacheable.
I tried to update from 1.30… to 1.41…, rename Preferences.xml, uninstall/reinstall PMS, delete all authorized entries and server entry too, use the ./claimpms.sh.

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But impossible to reclaim the server.
Strangely I have now something strange when I try to download PMS.
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I really appreciate if someone can help me.

2

Your server is having difficulty communicating with plex.tv servers, which is necessary to claim the server.

Try configuring the QNAP to use a public DNS server such as 1.1.1.1 (Cloudflare), 9.9.9.9 (Quad9) or 8.8.8.8 / 8.8.4.4 (Google).

You may also need to change the DNS settings on your PC. You should be able to download PMS and generate a claim code at https://account.plex.tv/en/claim.

Plex’s status page does not show any outages: https://status.plex.tv/. However, there could still be a local or regional problem causing difficulty reaching Plex hosts.

On QNAP NAS, when you uninstall PMS it also removes the Plex Data Folder. This will remove any existing library definitions, server settings, etc.

Just be aware of it for future updates, etc., so you do not have to completely re-create your server.

Also: User Credential Reset utility.

3

Thank you FordGuy61.
I changed DNS to cloudflare for both NAS and PC.
It’s Ok now for downloading QNAP version again.

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I use User Credential Utility, but got :
ERROR: Could not get credentials from plex.tv (Error: 60)
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4

For information NAS firmware is QTS 5.2.5.3145 and I updated last week

5

Do you have your own domain with a custom certificate?

6

No, not at all

7

Do you have a proxy?

Something is getting in the way. Trying to figure out what.

Edit: One other thing to check is the SSL certificate on the QNAP. See if it needs updating.

8

No proxy but double nat because I use an ASUS router behind BOX provider.
How can I check SSL certificate on QNAP ?
Seems that troubleshooting starts with NAS firmware upgrade.
I don’t use PLEX every day

9

See if the NAS has a certificate, possibly from Let’s Encrypt. If so, see if it can be renewed.

11

Thank you.
Only QNAP default SSL certificate.

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12

If can help, extract from Plex Media server Log

Jun 10, 2025 09:27:08.958 [139863778159416] DEBUG - [Req#321] Downloading document https://plex.tv/updater/products/5/check.xml?build=linux-x86_64&channel=16&distribution=qnap&version=1.41.7.9823-59f304c16
Jun 10, 2025 09:27:08.958 [139863778159416] DEBUG - [Req#321/HCl#112] HTTP requesting GET https://plex.tv/updater/products/5/check.xml?build=linux-x86_64&channel=16&distribution=qnap&version=1.41.7.9823-59f304c16
Jun 10, 2025 09:27:09.055 [139863788952376] WARN - [HttpClient/HCl#112] HTTP error requesting GET https://plex.tv/updater/products/5/check.xml?build=linux-x86_64&channel=16&distribution=qnap&version=1.41.7.9823-59f304c16 (60, SSL peer certificate or SSH remote key was not OK) (SSL: no alternative certificate subject name matches target host name ‘plex.tv’)
Jun 10, 2025 09:27:09.055 [139863776049976] ERROR - [Req#321] HTTP -60 downloading url https://plex.tv/updater/products/5/check.xml?build=linux-x86_64&channel=16&distribution=qnap&version=1.41.7.9823-59f304c16
Jun 10, 2025 09:27:09.055 [139863778159416] INFO - [Req#321] AutoUpdate: error getting data from plex.tv
Jun 10, 2025 09:27:09.055 [139863798803256] DEBUG - Completed: [192.168.50.103:52006] 200 PUT /updater/check?download=0 (5 live) #321 GZIP 97ms 320 bytes (pipelined: 9)
Jun 10, 2025 09:29:18.199 [139863771487032] DEBUG - [Req#2ff/HCl#113] HTTP requesting GET https://plex.tv/api/v2/features?X-Plex-Token=
Jun 10, 2025 09:29:18.342 [139863788952376] WARN - [HttpClient/HCl#113] HTTP error requesting GET https://plex.tv/api/v2/features?X-Plex-Token=xxxxxxxxxxxxxxxxxxxxficate or SSH remote key was not OK) (SSL: no alternative certificate subject name matches target host name ‘plex.tv’)
Jun 10, 2025 09:29:18.342 [139863771487032] WARN - [Req#2ff] FeatureManager: Couldn’t get features. Trying again soon.

13

But I can make an nslookup on plex.tv

nslookup plex.tv

Server: 127.0.1.1
Address: 127.0.1.1#53

Non-authoritative answer:
Name: plex.tv
Address: 52.31.226.115
Name: plex.tv
Address: 52.209.151.46

14

Your system looks OK (DNS works, certificate is valid). This may be something specific to QNAP and the latest firmware update.

I’m checking with someone more familiar with QNAP NAS.

16

Thank you for taking time to help me.
I appreciate

19

Hello,
Any news from QNAP NAS expert ?

21

Just installed v.1.41.8.9834-071366d65 (for QNAP)
But same issues :frowning:

22

Possible plex.tv problem. Changing PMS versions won’t help. It affects more than PMS on QNAP. Wait for additional info. Nothing you can do right now.

23

Thank you

24

Control Panel - Time – Make certain

  1. Test connection - pool.ntp.org
  2. Sync clock

I saw a report where QTS was unable to sync
(reason not stated)

25

Sync clock Ok.
But no progress on issue.