Please help. I can't connect plex media server installed on NAS(DS216j) by amazon fire tv

Plex Media Server NAS & Devices
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Server Version#:1.14.1.5488(latest)
Player Version#:7.9.0.8439(latest）

Hello, my name is Yoichi. I’m Japanese senior person.
My English and my information-tech skill is pretty limited, so it’s embarrassing for me to post articles to this forum. However, since I can’t find any Japanese support site or staff for the Plex system, I’m writing this to solve current situation.
I had been enjoying my family photos and videos installed in Synology NAS(DS216j) by Toshiba TV (connected by Amazon fire TV). But I couldn’t see those contents few month ago.
I installed Plex media server to NAS by using my main PC(i7-7700, 16GB-mem, 512GB-SSD, 4TB-HDD) by the way. I really want to recover my previous enjoyable time again.

At first I checked Plex support articles and FAQ items, but I couldn’t do my trouble shooting.
Then I tried to uninstall Plex media server from NAS. After rebooting NAS, I re-installed Plex media server successfully, and I can see every contents through NAS and windows
app(plex.tv site). Then I tried to log-in my account through Amazon fire tv, and my account was successfully linked to Plex app.(TV shows that “Account Linked” and “Your account has been successfully linked, please revisit app to continue”)
My amazon fire tv runs correctly, because I can see youtube or internet site on the browser.
When I check “Authorized Devices” page of the Plex media server, I can see “amazon fire tv”
listed. So I think my Plex media server is recognizing my fire tv.
However I can’t connect and see the contents on the Plex media server.

So as a next measure, I tried to have another Plex account. I deleted previous account and
got another new Plex account. When I manage to get new account, I got some alarm message such as “username or password is incorrect” or “username has already been taken”.
After I straggled those alarm message, I eventually got new account. But I still can’t connect
media server yet. Then I tried to install window version Plex media server to my wife’s lap top
computer(i7-4700, 16GB-mem, 180GB-SSD and 1TB HDD). I could get another wife’s Plex account, but same alarm(“username or password is incorrect”) occurred, and I couldn’t launch
window version Plex media server on my wife’s lap top.
According to the above experience, it looks that getting multiple account is not allowed in the same LAN. I think my attempt of multiple account registration may caused another problem.

I also tried to connect my contents with my iPhone and iPad. I installed Plex app to those devices and connected Plex media server successfully. However I can only see “recently added photoes”. I can see the thumbnail photos which was created previously, but can’t see
the contents. I also can’t see any previous videos of Plex server contents. This is also very strange for me.
The reason why I tried to install Plex app to my iPhone/iPad is just the trouble-shooting purpose. I usually see my photos/videos by synology related iOS app(DS photo and DS video).

I’m sorry for posting very long and poor sentences. But, please help for the following question,

  1. Is there any advise to find the reason of miss- connection between Plex media server on
    NAS and amazon fire tv?
  2. I plan to reset NAS system initially(clean install) or purchase new model NAS and install
    every contents again. If i do clean install, is there a good chance to slove the current
    situation?
    ( My concern is that even if I clean-initialization of my NAS system, Plex multi account
    ploblems may still exist. Or there’s maybe some problems to my wifi rooter settings.)

Thank you,

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Hello, Mr.Plex Ninjja,

Thank you very very much for responding my question.
Based on your advice, I checked the following items,

  1. IPv6 should be disabled
  2. Secure connections should be set to ‘preferred’
  3. Preferred network interface should be set to the NIC/IP Address that you use for Plex.

Regarding item 3. , network interface previously shows “all”, so I chose “eth0(192.168.11.9)” which is my NAS server’s IP-address. I didn’t forget to click on Save Changes.

I also rebooted modem/router. I uninstalled/re-installed Plex app on fire tv.
I confirmed my router devise’s IP-address info as follow,
-Router(WXR-1900DHP3) : 192.168.11.1
-NAS-server : 192.168.11.9
-My PC : 192.168.11.3
-My wife’s lap-top PC : 192.168.11.10
-My iPad : 192.168.11.5
-My iPhone : 192.168.11.6
-Amazon fire tv : 192.168.11.2
(As I wrote in my previous post, item of “amazon fire tv” is listed on “Authorized Devices”
page of the Plex media server. So I think my Plex media server should be recognizing
my fire tv.)

Unfortunately, I still can’t connect and see the contents through amazon fire tv.
I can see my contents by every devices(My PC/My wife’s PC/iPad/iPhone) except
amazon tv. I already confirmed that my amazon tv is working, because I can see YouTube, Amazon videos, and other internet pages.
The reason why I want to connect amazon tv is that I like to see my contents on large TV screen.

I’m sorry for bothering you, but please let me know what kind of other actions should I check.
I really appreciate your support.

Thank you,

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Mr. Plex Ninja

Thank you for your quick support.
I followed your advice and finally succeeded to connect fire-tv to Plex media server.
I’m sure my rest of life will become enjoyable from now on.
I think it’s really grateful for me to post this forum, because I realized that such a kind
skillful moderator like you is working there.
When I was young, I saw “Mutant Ninja Turtles” as very cool movie.
I’m sure Mr. Plex “Ninja” is definitely my hero.

Thank you very very very much,

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