Jellyfin-web fails to display list of favorites

[MechMK1]

Describe The Bug When clicking on a list of songs in the favorites tab, an endless spinner appears and a JavaScript error is printed to the console

Steps To Reproduce

1. Log into Jellyfin Web
2. Click on Favorites
3. Click on Songs
4. An endless spinner appears

Logs The following error appears in the javascript console:

Uncaught (in promise) TypeError: e is null
    e list.ea9e763cb335ac6a57c1.chunk.js:formatted:1813
    promise callback*23416/e/< list.ea9e763cb335ac6a57c1.chunk.js:formatted:1809
    d main.jellyfin.bundle.js:2
    value main.jellyfin.bundle.js:2
    promise callback*value main.jellyfin.bundle.js:2
    f main.jellyfin.bundle.js:2
    s main.jellyfin.bundle.js:2
    s main.jellyfin.bundle.js:2
    a main.jellyfin.bundle.js:2
    promise callback*l main.jellyfin.bundle.js:2
    u main.jellyfin.bundle.js:2
    u main.jellyfin.bundle.js:2
    f main.jellyfin.bundle.js:2
    A main.jellyfin.bundle.js:2
    s main.jellyfin.bundle.js:2
    s main.jellyfin.bundle.js:2
    u main.jellyfin.bundle.js:2
    u main.jellyfin.bundle.js:2
    A main.jellyfin.bundle.js:2
    promise callback*12854/t.A/< main.jellyfin.bundle.js:2
    Fi node_modules.react-dom.bundle.js:2
    unstable_runWithPriority 60232.bundle.js:2
    jl node_modules.react-dom.bundle.js:2
    Mi node_modules.react-dom.bundle.js:2
    Oi node_modules.react-dom.bundle.js:2
    N 60232.bundle.js:2
    onmessage 60232.bundle.js:2
    77699 60232.bundle.js:2
    s runtime.bundle.js:1
    91434 60232.bundle.js:2
    s runtime.bundle.js:1
    76067 node_modules.react-dom.bundle.js:2
    s runtime.bundle.js:1
    78325 node_modules.react-dom.bundle.js:2
    s runtime.bundle.js:1
    67816 main.jellyfin.bundle.js:2
    s runtime.bundle.js:1
    <anonymous> main.jellyfin.bundle.js:2
    O runtime.bundle.js:1
    <anonymous> main.jellyfin.bundle.js:2
    a runtime.bundle.js:1
    <anonymous> main.jellyfin.bundle.js:2
list.ea9e763cb335ac6a57c1.chunk.js:formatted:1813:34
    e list.ea9e763cb335ac6a57c1.chunk.js:formatted:1813
    (Async: promise callback)
    e list.ea9e763cb335ac6a57c1.chunk.js:formatted:1809
    d main.jellyfin.bundle.js:2
    value main.jellyfin.bundle.js:2
    (Async: promise callback)
    value main.jellyfin.bundle.js:2
    f main.jellyfin.bundle.js:2
    s main.jellyfin.bundle.js:2
    s main.jellyfin.bundle.js:2
    a main.jellyfin.bundle.js:2
    (Async: promise callback)
    l main.jellyfin.bundle.js:2
    u main.jellyfin.bundle.js:2
    u main.jellyfin.bundle.js:2
    f main.jellyfin.bundle.js:2
    A main.jellyfin.bundle.js:2
    s main.jellyfin.bundle.js:2
    s main.jellyfin.bundle.js:2
    u main.jellyfin.bundle.js:2
    u main.jellyfin.bundle.js:2
    A main.jellyfin.bundle.js:2
    (Async: promise callback)
    A main.jellyfin.bundle.js:2
    Fi node_modules.react-dom.bundle.js:2
    unstable_runWithPriority 60232.bundle.js:2
    jl node_modules.react-dom.bundle.js:2
    Mi node_modules.react-dom.bundle.js:2
    Oi node_modules.react-dom.bundle.js:2
    N 60232.bundle.js:2
    onmessage 60232.bundle.js:2
    (Async: EventHandlerNonNull)
    77699 60232.bundle.js:2
    s runtime.bundle.js:1
    91434 60232.bundle.js:2
    s runtime.bundle.js:1
    76067 node_modules.react-dom.bundle.js:2
    s runtime.bundle.js:1
    78325 node_modules.react-dom.bundle.js:2
    s runtime.bundle.js:1
    67816 main.jellyfin.bundle.js:2
    s runtime.bundle.js:1
    <anonymous> main.jellyfin.bundle.js:2
    O runtime.bundle.js:1
    <anonymous> main.jellyfin.bundle.js:2
    a runtime.bundle.js:1
    <anonymous> main.jellyfin.bundle.js:2

I believe this references the file src/controller/list.js, specifically line L859. It seems that item is null, although I don't know why that could be.

Screenshots

Showing a list of favorites works:

But when clicking on "Songs", it ends in an endless spinner:

Here is the relevant bit of source code in the debugger:

System (please complete the following information):

• Platform: Linux
• Browser: Firefox
• Jellyfin Version: 10.9.11

Additional Context Bug appeared recently, so either 10.9.10 or 10.9.9 were good.

[MechMK1]

Sounds good. I'll close this bug when 10.9.12 is out and I can confirm it fixed.

[MechMK1]

I hotpatched my existing deployment by modifying the minified .js file and it works fine now.