Update troubleshouting

[muisje]

So i'm running jellyfin with this image jellyfin/jellyfin with docker. Currently on the lastest version 10.10.5.

First thing is that index.html is at another location. It's not at at /usr/share/jellyfin/web/index.html, but at /jellyfin/jellyfin-web/index.html. I guess that's because i'm using a docker container. Would be nice to to have if it could be stated that the index.html could be in one of these locations. Found the index.html by doing this:

docker exec -it jellyfin bash
find / -name index.html 2>/dev/null

I had this problem:

jellyfin  | [10:42:40] [ERR] [1] Namo.Plugin.InPlayerEpisodePreview.InPlayerEpisodePreviewPlugin: Encountered exception while writing to /jellyfin/jellyfin-web/index.html: System.UnauthorizedAccessException: Access to the path '/jellyfin/jellyfin-web/index.html' is denied.
jellyfin  |  ---> System.IO.IOException: Permission denied

Turns out my the ownership was wrong (set to root root).

solution:

Changing the ownership (replacing jellyfin with your containername, user and group with the user and group of your container)

docker exec -it --user root jellyfin chown user:group /jellyfin/jellyfin-web/index.html

After restarting the container the error is gone and the button shows up.

[Namo2]

Thank you for the input. I will add it to the readme in the next few days.

[xeuc]

Hello,
I ran into the same issue on Windows:

[2025-03-23 09:53:35.129 +01:00] [INF] [1] Namo.Plugin.InPlayerEpisodePreview.InPlayerEpisodePreviewPlugin: Attempting to inject preview script code in "C:\Program Files\Jellyfin\Server\jellyfin-web\index.html"
[2025-03-23 09:53:35.140 +01:00] [ERR] [1] Namo.Plugin.InPlayerEpisodePreview.InPlayerEpisodePreviewPlugin: Encountered exception while writing to "C:\Program Files\Jellyfin\Server\jellyfin-web\index.html": "System.UnauthorizedAccessException: Access to the path 'C:\Program Files\Jellyfin\Server\jellyfin-web\index.html' is denied.
   at Microsoft.Win32.SafeHandles.SafeFileHandle.CreateFile(String fullPath, FileMode mode, FileAccess access, FileShare share, FileOptions options)
   at Microsoft.Win32.SafeHandles.SafeFileHandle.Open(String fullPath, FileMode mode, FileAccess access, FileShare share, FileOptions options, Int64 preallocationSize, Nullable`1 unixCreateMode)
   at System.IO.File.OpenHandle(String path, FileMode mode, FileAccess access, FileShare share, FileOptions options, Int64 preallocationSize)
   at System.IO.File.WriteToFile(String path, FileMode mode, String contents, Encoding encoding)
   at Namo.Plugin.InPlayerEpisodePreview.InPlayerEpisodePreviewPlugin..ctor(IApplicationPaths applicationPaths, IXmlSerializer xmlSerializer, ILogger`1 logger, IServerConfigurationManager configurationManager)"

However, on this OS, the solution is slightly different:

1. Navigate to: C:\Program Files\Jellyfin\Server\jellyfin-web\
2. Right-click on index.html → Properties → Security tab → Click on Edit
3. Select your user from the list and check the Write permission box.
4. Restart both the server and client.

Would it be possible to include this in the README so Windows users can easily find the solution?

Thanks!

[pavichokche]

Thanks @xeuc your steps got the extension working for me again!

[Namo2]

I added both solutions to the readme. Thanks for the help guys

[BadutSaurus]

i still cannot see the button, im using web from a docker container. for my case the permission is not denied when i try to run

docker exec -it jellyfin bash
find / -name index.html 2>/dev/null

it just simply gave me the location of the file.

can anyone help?

[muisje]

i still cannot see the button, im using web from a docker container. for my case the permission is not denied when i try to run

docker exec -it jellyfin bash
find / -name index.html 2>/dev/null

it just simply gave me the location of the file.

can anyone help?

Yeah, so read the part under solution and execute it

[BadutSaurus]

i still cannot see the button, im using web from a docker container. for my case the permission is not denied when i try to run

docker exec -it jellyfin bash
find / -name index.html 2>/dev/null

it just simply gave me the location of the file.
can anyone help?

Yeah, so read the part under solution and execute it

oh my god, i am so sorry for wasting your time. I just copy and paste it without think and edit it, so it does not work. Now it is working after I modify the command with my user and group and the location of the file aswell. Thankyou very much.