[Help] Control Panel missing shortly after update [SOLVED]

[zravis]

Hi everyone,

I just updated my F2-423 from TOS 5 to 6, everything went smoothly and was working fine for a few hours, but after configuring and logging in and out through the web browser several times I somehow have lost all applications and access to control panel. All I have on screen is File Manager and Plex. I have tried clearing browser cache and cookies, reboot the NAS, tried TNAS PC and I'm unable to access anything configuration-wise. Does anyone have any idea what happened or how I can fix this?

[EriChan]

To accurately identify and resolve the issue, please try the following troubleshooting steps:

1. Try logging in using your browser's incognito/private mode to completely rule out interference from browser plugins or other factors.

2. Attempt to log in to TNAS via SSH login to TNAS. After logging in, execute the following two commands to check the service status:

Code: Select all

systemctl status nginx

Code: Select all

systemctl status TOSDaemon.service

If any service status is abnormal (not `active (running)`, etc.), try restarting the services using the following commands:

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systemctl restart nginx

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systemctl restart TOSDaemon.service

[zravis]

Hi,

Thanks for assisting me, I have tried an incognito login and that didn't change anything. I ran the commands through putty and both services appear to be running. This is what I received from the commands:


zravis@TNAS:~# systemctl status nginx
● nginx.service - A high performance web server and a reverse proxy s
erver
Loaded: loaded (/lib/systemd/system/nginx.service; enabled; vendor preset:
enabled)
Active: active (running) since Sat 2026-02-21 17:54:01 PST; 2 da
ys ago
Docs: man:nginx(8)
Main PID: 2892 (nginx)
Tasks: 5 (limit: 4453)
Memory: 17.3M
CPU: 9.520s
CGroup: /system.slice/nginx.service
├─2892 "nginx: master process /usr/sbin/nginx -g daemon on; master_
process on;"
├─3636 "nginx: worker process" "" "" "" "" "" "" "" "" "" "" "" ""
"" "" "" "" "" "" "" "" "" "" "" "" "" "" ""
├─3637 "nginx: worker process" "" "" "" "" "" "" "" "" "" "" "" ""
"" "" "" "" "" "" "" "" "" "" "" "" "" "" ""
├─3638 "nginx: worker process" "" "" "" "" "" "" "" "" "" "" "" ""
"" "" "" "" "" "" "" "" "" "" "" "" "" "" ""
└─3639 "nginx: worker process" "" "" "" "" "" "" "" "" "" "" "" ""
"" "" "" "" "" "" "" "" "" "" "" "" "" "" ""

Feb 21 17:54:00 TNAS systemd[1]: Starting A high performance web server and a re
verse proxy server...
Feb 21 17:54:01 TNAS nginx_prepare[2774]: No configuration errors found.
Feb 21 17:54:01 TNAS nginx[2891]: nginx: [warn] the "ssl" directive is deprecate
d, use the "listen ... ssl" directive instead in /etc/nginx/nginx.conf:65
Feb 21 17:54:01 TNAS systemd[1]: Started A high performance web server and a rev
erse proxy server.

zravis@TNAS:~# systemctl status TOSDaemon.service
● TOSDaemon.service - Start TOSDeamon service
Loaded: loaded (/lib/systemd/system/TOSDaemon.service; enabled; vendor pres
et: enabled)
Active: active (running) since Sat 2026-02-21 17:55:53 PST; 2 da
ys ago
Main PID: 3028 (TOSDaemon)
Tasks: 25 (limit: 4453)
Memory: 314.8M
CPU: 17min 50.146s
CGroup: /critical.slice/TOSDaemon.service
├─3028 /usr/sbin/TOSDaemon
└─3675 /usr/sbin/ter_vg_monitor

Feb 23 11:55:58 TNAS TOSDaemon[3028]: 1 2026-02-23T11:55
:58-08:00 - - TOSDaemon(3028) - [attrs actual="1350" expected="1350" topic="load
"] metrics persisted
Feb 23 11:55:58 TNAS TOSDaemon[3028]: 1 2026-02-23T11:55
:58-08:00 - - TOSDaemon(3028) - [attrs actual="1350" expected="1350" topic="net"
] metrics persisted
Feb 23 11:55:58 TNAS TOSDaemon[3028]: 1 2026-02-23T11:55
:58-08:00 - - TOSDaemon(3028) - [attrs actual="1350" expected="1350" topic="cpu"
] metrics persisted
Feb 23 11:55:58 TNAS TOSDaemon[3028]: 1 2026-02-23T11:55
:58-08:00 - - TOSDaemon(3028) - [attrs actual="1350" expected="1350" topic="mem"
] metrics persisted
Feb 23 12:00:01 TNAS TOSDaemon[3028]: [DEBUG /bin/bash -c ntpdate -b pool.ntp.org]
Feb 23 17:55:50 TNAS TOSDaemon[3028]: 1 2026-02-23T17:55:50-08:00 - - TOSDaemon(3028) - [attrs actual="1080" expected="1080" topic="disk"] metrics persisted
Feb 23 17:55:58 TNAS TOSDaemon[3028]: 1 2026-02-23T17:55:58-08:00 - - TOSDaemon(3028) - [attrs actual="1350" expected="1350" topic="load"] metrics persisted
Feb 23 17:55:58 TNAS TOSDaemon[3028]: 1 2026-02-23T17:55:58-08:00 - - TOSDaemon(3028) - [attrs actual="1350" expected="1350" topic="net"] metrics persisted
Feb 23 17:55:58 TNAS TOSDaemon[3028]: 1 2026-02-23T17:55:58-08:00 - - TOSDaemon(3028) - [attrs actual="1350" expected="1350" topic="mem"] metrics persisted
Feb 23 17:55:58 TNAS TOSDaemon[3028]: 1 2026-02-23T17:55:58-08:00 - - TOSDaemon(3028) - [attrs actual="1350" expected="1350" topic="cpu"] metrics persisted
zravis@TNAS:~#

[GevinKe]

Thank you for performing the checks and providing the detailed service status. The fact that both nginx and TOSDaemon are running normally indicates the core system is functional. The issue is likely isolated to the user interface (UI) configuration or session management.

This can sometimes happen after a major version upgrade, especially with repeated logins/logouts.
There is a known issue in some early TOS 6 versions where the desktop UI fails to load completely under certain conditions (similar to "TOS desktop floating window duplication" but more severe). The fix is usually to update to the latest TOS 6 version and clear browser cache.

Please confirm your exact TOS 6 version
You can consider reinstalling TOS6.

[zravis]

Hi,

I have cleared the cache and tried to restart the desktop service, but it does not appear to exist.

zravis@TNAS:~# systemctl restart tos-desktop.service
Failed to restart tos-desktop.service: Unit tos-desktop.service not found.

[TMzethar]

From the screenshot you provided, it seems you are currently logged in as a regular user rather than an administrator. Or have you accidentally downgraded the administrator account you are currently using to a regular user?

[zravis]

After the upgrade, I couldn't access Plex anymore so yes I did update the user permissions to get that working. I don't think I changed anything I shouldn't have but maybe I did by mistake, is there any way to verify at this point?

It is v6.0.770-00002.

[TMzethar]

Could you please describe in detail how you are unable to 'access Plex anymore'? (Screenshots would be helpful.)
If you are referring to the issue where clicking does not open the Plex web page, please log in to the TOS web page as an administrator and check if the Plex Media Server app is enabled.
If you are unable to enable the Plex Media Server app smoothly, there might be an error in the Plex configuration file. In this case, you can try renaming the Plex shared folder to Plex_old, then restart the Plex Media Server to regenerate a new configuration.

[zravis]

Thanks for everyone's continued assistance.

Plex is working fine right now, but initially after I had updated it wasn't. Since my configuration is pretty simple, I'm thinking maybe I should just reinstall TOS this weekend to fix whatever happened to my control panel. So the correct procedure to retain data is to pull the disks out and reboot to reinstall TOS?

[TMzethar]

You may not have completed the upgrade and update according to the specified procedure initially, skipping some steps, which led to this issue. Please refer to the specific procedure here: viewtopic.php?t=6809

Before starting the NAS, remove the disk to enter the initialization process.
If you have installed an M.2 SSD on F2-423 as TOS target, the method is different for. Please refer to:viewtopic.php?t=7179
If prompted with 'Delete' or formatting during installation, do not proceed, as this will result in data loss. Instead, if no prompt appears, you can complete the TOS reinstallation without affecting the data on the disk.
If during the installation process it prompts you to 'delete' or format, do not proceed, as this will result in data loss. Instead, if it does not prompt you, you can complete the TOS reinstallation without affecting the data on the disk.