Unable to get it working with Emby - Stuck on "Loading Moonfin"

[arcoast]

I am running Emby v4.9.5.0 using a container:

services:
    emby:
        image: lscr.io/linuxserver/emby
        container_name: emby
        devices:
            - /dev/dri:/dev/dri
        networks:
            ldap:
            traefik:
        ports:
            - 8096:8096
            # - 8920:8920
        env_file: .env
        volumes:
            - ${MNTUSER}:/mnt/user
            - ${CONFIG}/emby/emby:/config
        restart: unless-stopped

My .env

TZ=Europe/London
PUID=99
PGID=100
MNTUSER=/mnt/user
CONFIG=/mnt/cache/appdata

My users/group

# id -u nobody
99
# getent group users
users:x:100:

I've downloaded v2.0.0 from here, extracted the contents and copied to my Emby plugins folder.

# ls -la
total 20M
drwxrwxrwx  5 nobody users   28 Jul 19 05:54 ./
drwxrwxrwx 13 nobody users   14 Aug 17  2025 ../
-rwxrwxrwx  1 nobody users  41K Apr 20 05:08 AudioDb.dll*
drwxrwxrwx  3 nobody users    3 Aug 19  2023 CoverArt/
-rw-r--r--  1 nobody users  13M Jul 19 06:24 CoverArt.dll
-rwxrwxrwx  1 nobody users  25K Dec 31  2019 DeviceEditor.dll*
-rwxrwxrwx  1 nobody users 433K Oct 12  2025 Emby.DataExplorer2.dll*
-rwxrwxrwx  1 nobody users 189K May  7 20:31 Emby.Plugin.Sse.dll*
-rwxrw-rw-  1 nobody users 1.1M Jul 16 15:57 Emby.Plugins.Moonfin.dll*
-rwxrwxrwx  1 nobody users 105K Mar  5 16:12 Emby.Webhooks.dll*
-rwxrwxrwx  1 nobody users 216K Jul 22  2024 EmbyReports.dll*
-rwxrwxrwx  1 nobody users  67K Mar  5 16:12 Fanart.dll*
-rwxrwxrwx  1 nobody users 129K Jun 17  2025 GenreCleaner.dll*
-rwxrwxrwx  1 nobody users 258K Nov  8  2024 LDAP.dll*
-rwxrwxrwx  1 nobody users 232K Mar  5 16:12 MBBackup.dll*
-rwxrwxrwx  1 nobody users 153K Dec 23  2025 MovieDb.dll*
-rwxrwxrwx  1 nobody users 134K May 19 06:50 MusicBrainz.dll*
-rwxrwxrwx  1 nobody users 209K Mar  5 16:12 NfoMetadata.dll*
-rwxrwxrwx  1 nobody users  50K Mar 16  2025 OMDb.dll*
-rwxrwxrwx  1 nobody users  84K Mar  5 16:12 OpenSubtitles.dll*
-rwxrwxrwx  1 nobody users  81K May 21  2022 SchedulesDirect.dll*
-rwxrw-rw-  1 nobody users 1.5M Jul 16 15:57 SharpCompress.dll*
-rwxrwxrwx  1 nobody users 141K Sep 13  2025 Statistics.dll*
-rwxrwxrwx  1 nobody users 102K Jun 14  2025 StudioCleaner.dll*
-rwxrwxrwx  1 nobody users  25K May 28  2023 StudioImages.dll*
-rwxrwxrwx  1 nobody users 161K Oct 29  2025 Tvdb.dll*
drwxrwxrwx  3 nobody users   35 Jul 18 23:11 configurations/
drwxrwxrwx  8 nobody users   21 Jul 19 05:54 web/

The web folder

# ls -la ./web
total 34903
drwxrwxrwx 8 nobody users       21 Jul 19 05:54 ./
drwxrwxrwx 5 nobody users       28 Jul 19 05:54 ../
-rwxrw-rw- 1 nobody users       32 Jul 16 15:57 .last_build_id*
drwxrwxrwx 6 nobody users       10 Jul 19 05:54 assets/
drwxrwxrwx 4 nobody users       16 Jul 19 05:54 canvaskit/
-rwxrw-rw- 1 nobody users   354112 Jul 16 15:57 drift_worker.js*
-rwxrw-rw- 1 nobody users     3475 Jul 16 15:57 favicon.png*
-rwxrw-rw- 1 nobody users     9553 Jul 16 15:57 flutter.js*
-rwxrw-rw- 1 nobody users    10093 Jul 16 15:57 flutter_bootstrap.js*
-rwxrw-rw- 1 nobody users      784 Jul 16 15:57 flutter_service_worker.js*
drwxrwxrwx 2 nobody users        6 Jul 19 05:54 icons/
-rwxrw-rw- 1 nobody users     5537 Jul 16 15:57 index.html*
-rwxrw-rw- 1 nobody users 19228825 Jul 16 15:57 main.dart.js*
-rwxrw-rw- 1 nobody users    62705 Jul 16 15:57 main.dart.mjs*
-rwxrw-rw- 1 nobody users 14830423 Jul 16 15:57 main.dart.wasm*
-rwxrw-rw- 1 nobody users     1437 Jul 16 15:57 manifest.json*
drwxrwxrwx 2 nobody users        4 Jul 19 05:54 screenshots/
-rwxrw-rw- 1 nobody users   730989 Jul 16 15:57 sqlite3.wasm*
drwxrwxrwx 4 nobody users        5 Jul 19 05:54 theme/
drwxrwxrwx 5 nobody users        5 Jul 19 05:54 vendor/
-rwxrw-rw- 1 nobody users       91 Jul 16 15:57 version.json*

I've restarted the container and can access the Moonfin plugin settings.

When I try to visit http://IP-ADDRESS:8096/Moonfin/Web I just see the loading screen

I've tried different browsers (Chrome based) cleared all my cookies and tried incognito mode but nothing seems to help.

Browser logs:

Error with Permissions-Policy header: Unrecognized feature: 'browsing-topics'.

main.dart.mjs:1 Failed to load module script: Expected a JavaScript-or-Wasm module script but the server responded with a MIME type of "application/octet-stream". Strict MIME type checking is enforced for module scripts per HTML spec.

Web:1 Uncaught (in promise) TypeError: Failed to fetch dynamically imported module: http://IP-ADDRESS:8096/Moonfin/Web/main.dart.mjs

Emby Logs show:

2026-07-19 07:24:03.175 Info WebService-0HNN5BCS0CGJL:00000061: http/1.1 Response 404 to host3. Time: 0ms. GET http://host4:8096/Moonfin/Web/flutter.js.map.

flutter.js and main.dart.mjs are present in the ./web folder

# ls -la
total 35M
drwxrwxrwx 8 nobody users   21 Jul 19 05:54 ./
drwxrwxrwx 5 nobody users   28 Jul 19 05:54 ../
-rwxrw-rw- 1 nobody users   32 Jul 16 15:57 .last_build_id*
drwxrwxrwx 6 nobody users   10 Jul 19 05:54 assets/
drwxrwxrwx 4 nobody users   16 Jul 19 05:54 canvaskit/
-rwxrw-rw- 1 nobody users 346K Jul 16 15:57 drift_worker.js*
-rwxrw-rw- 1 nobody users 3.4K Jul 16 15:57 favicon.png*
-rwxrw-rw- 1 nobody users 9.4K Jul 16 15:57 flutter.js*
-rwxrw-rw- 1 nobody users 9.9K Jul 16 15:57 flutter_bootstrap.js*
-rwxrw-rw- 1 nobody users  784 Jul 16 15:57 flutter_service_worker.js*
drwxrwxrwx 2 nobody users    6 Jul 19 05:54 icons/
-rwxrw-rw- 1 nobody users 5.5K Jul 16 15:57 index.html*
-rwxrw-rw- 1 nobody users  19M Jul 16 15:57 main.dart.js*
-rwxrw-rw- 1 nobody users  62K Jul 16 15:57 main.dart.mjs*
-rwxrw-rw- 1 nobody users  15M Jul 16 15:57 main.dart.wasm*
-rwxrw-rw- 1 nobody users 1.5K Jul 16 15:57 manifest.json*
drwxrwxrwx 2 nobody users    4 Jul 19 05:54 screenshots/
-rwxrw-rw- 1 nobody users 714K Jul 16 15:57 sqlite3.wasm*
drwxrwxrwx 4 nobody users    5 Jul 19 05:54 theme/
drwxrwxrwx 5 nobody users    5 Jul 19 05:54 vendor/
-rwxrw-rw- 1 nobody users   91 Jul 16 15:57 version.json*

Not really sure what to try next and would really appreciate any help offered!

EDIT: I can connect to my server using the hosted moonfin.io but not from a Roku on my LAN, which gives "Server not found, is it online?" (This is with a Chrome based browser)

EDIT2: It's working in a fresh Firefox install, but I can't get it working in any Chrome based browser.

[Waffull]

Doesn't seem to work with ChromeOS either. I tried incognito mode, but still doesn't load. I was able to get it to load in Firefox on an Android phone. Wouldn't load in Chrome, DuckDuckGo or Brave. I have eliminated all of my Windows machines over the past decade. I use Chromebooks exclusively now.

Happy to help in any way, if I can.

[arcoast]

It's helpful that you've been able to reproduce my findings, just to check, you're using Emby as well, not Jellyfin?

[RadicalMuffinMan]

Hi! Thank you for the detailed post! This has been fixed and added to the new release in a few hours

[arcoast]

Much appreciated

[Waffull]

Yes, Emby. :)

…

On Tue, Jul 21, 2026, 5:30 PM arcoast ***@***.***> wrote: It's helpful that you've been able to reproduce my findings, just to check, you're using Emby as well, not Jellyfin? — Reply to this email directly, view it on GitHub <#196?email_source=notifications&email_token=AC767ZJHB3GX362IIUPGL3D5F7OJDA5CNFSNUABIM5UWIORPF5TWS5BNNB2WEL2ENFZWG5LTONUW63SDN5WW2ZLOOQXTCNZXGIZTKMJSUZZGKYLTN5XKOY3PNVWWK3TUUVSXMZLOOSWGM33PORSXEX3DNRUWG2Y#discussioncomment-17723512>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AC767ZMI27XQJGNPNNO27H35F7OJDAVCNFSNUABJKJSXA33TNF2G64TZHMYTCNJSGUZDINJXGI5UI2LTMN2XG43JN5XDWMJQGQ2TKNBXG6QXMAQ> . You are receiving this because you commented.Message ID: ***@***.***>

[Waffull]

That's great, I'll give it a try.

…

On Wed, Jul 22, 2026, 4:41 PM arcoast ***@***.***> wrote: Much appreciated — Reply to this email directly, view it on GitHub <#196?email_source=notifications&email_token=AC767ZM3WKKEFFZQZKSTVI35GERIJA5CNFSNUABIM5UWIORPF5TWS5BNNB2WEL2ENFZWG5LTONUW63SDN5WW2ZLOOQXTCNZXGM4TSOJVUZZGKYLTN5XKOY3PNVWWK3TUUVSXMZLOOSWGM33PORSXEX3DNRUWG2Y#discussioncomment-17739995>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AC767ZIGW7MHMWEGW2IIH3L5GERIJAVCNFSNUABJKJSXA33TNF2G64TZHMYTCNJSGUZDINJXGI5UI2LTMN2XG43JN5XDWMJQGQ2TKNBXG6QXMAQ> . You are receiving this because you commented.Message ID: ***@***.***>

[Waffull]

Unfortunately replacing those two files (the Web directory wasn't part of the build (zip) file, did not resolve the issue with using Chrome.

PS: I did restart Emby after replacing the files and I did clear browser cache as well as try from an incognito window.

[arcoast]

@Waffull I don't think the new build has been released yet.

If I'm not mistaken however, this is the commit that fixes the issue but no new plugin release has been produced yet with this fix incorporated.

[RadicalMuffinMan]

You're correct! I'll release it in a moment, just finished the rest of the Moonfin-Core update and I need to get some coffee

[arcoast]

Yeah, no worries @RadicalMuffinMan, was just trying to help @Waffull from wondering why things aren't quite working yet.

[Waffull]

Ah, ok. My apologies. I had pulled the files from the action build.

[arcoast]

@RadicalMuffinMan Can comfirm I can now login with v2.0.1

Thanks