[BUG] YouTubeDownloadRequest returns `-'.: Cannot read property 'call' of undefined`

[DaniNotFound702]

Tubifarry Version

v2.1.0.0

Lidarr Version

v3.1.2.4913

Operating System

Docker

Bug Description

When i download a song from Youtube with tubifarry i get the error that you can see in image 1.

Steps to Reproduce

Step 1: Select a song from the youtube indexer (image 1)
Step 2: Looks in Lidarr > System > events and see error (image

Settings:

Expected Behavior

I expect that the song download without a error

Trace Log Files

Logs

026-06-19 23:04:02.4|Trace|Http|Res: 24199 [GET] /api/v1/album?artistId=300: 200.OK (130 ms)
2026-06-19 23:04:02.4|Debug|Api|[GET] /api/v1/album?artistId=300: 200.OK (130 ms)
2026-06-19 23:04:02.4|Trace|Http|Req: 24208 [GET] /api/v1/trackfile?artistId=300 (from ::1 python-requests/2.32.5)
2026-06-19 23:04:02.4|Error|YouTubeDownloadRequest|Failed to process track 'Thank You (feat. Jonsal Barrientes & Tiffany Hudson)' in album 'SO BE IT'
2026-06-19 23:04:02.4|Error|YouTubeDownloadRequest|Failed to process track 'Thank You (feat. Jonsal Barrientes & Tiffany Hudson)' in album 'SO BE IT'.

[v3.1.2.4913] Jint.Runtime.JavaScriptException: Cannot read property 'call' of undefined
 ---> Error: Cannot read property 'call' of undefined
    at g.iz (:11:31)
    at ZF (:15:66)
    at sigFunction (:22:20)
    at <anonymous>:1:1
   --- End of inner exception stack trace ---
   at Jint.Engine.ScriptEvaluation(ScriptRecord scriptRecord, ParserOptions parserOptions)
   at Jint.Engine.ExecuteWithConstraints[T](Boolean strict, Func`1 callback)
   at Jint.Engine.Execute(Prepared`1& preparedScript)
   at YouTubeMusicAPI.Internal.Player.Decipher(String url, String signatureCipher, String cipher, String poToken)
   at YouTubeMusicAPI.Internal.Selectors.SelectStreamInfo(JToken value, Func`2 getUrl)
   at YouTubeMusicAPI.Internal.Parsers.StreamingParser.GetData(JObject jsonToken, Player player, String poToken)
   at YouTubeMusicAPI.Client.YouTubeMusicClient.GetStreamingDataAsync(String id, CancellationToken cancellationToken)
   at Tubifarry.Download.Clients.YouTube.YouTubeDownloadRequest.ProcessAlbumAsync(String downloadUrl, CancellationToken token)


2026-06-19 23:04:02.4|Trace|YouTubeDownloadRequest|Updating client with video-bound tokens for: E5Ka4dd0MCc
2026-06-19 23:04:02.4|Trace|TrustedSessionHelper|Generating video-bound token for E5Ka4dd0MCc using bgutil service
2026-06-19 23:04:02.4|Trace|TrustedSessionHelper|Fetching token from bgutil service: http://127.0.0.1:4416/get_pot for video E5Ka4dd0MCc
2026-06-19 23:04:02.4|Trace|TrustedSessionHelper|Received response: {"contentBinding":"E5Ka4dd0MCc","poToken":"MltdexFHpE6oLF0_4FOYsORKpUgXjK3m2AfmiN863SE0So7q0i_9hCDpg0WK3kYSuff9WIVvUEJzhgUfUUAd4LhizWNG-W-iITt9q4j_geNZbZD94Ws7prqn6BKy","expiresAt":"2026-06-20T03:04:02.432Z"}
2026-06-19 23:04:02.4|Trace|TrustedSessionHelper|Successfully fetched tokens from bgutil (Video-Bound). Expiry: 6/20/2026 3:04:02 AM
2026-06-19 23:04:02.4|Trace|TrustedSessionHelper|Updated client with video-bound tokens for E5Ka4dd0MCc

Log Checklist

• I have enabled Trace logging in Lidarr before reproducing the issue

Screenshots

Screenshots

Additional Context

Lidarr runs in docker behind glueton vpn

[Calrissian45]

Confirming this persists on Tubifarry v2.1.1 / Lidarr v3.1.3.4968 (Docker), so
2.1.1 didn't change it. Same Player.Decipher / "Cannot read property 'call' of
undefined" trace.

Two additions: it also fails on the indexer path, not just the download client,
at the same line:
at YouTubeMusicAPI.Internal.Player.Decipher(...)
at Tubifarry.Indexers.YouTube.YouTubeParser.EnrichAlbumWithYouTubeDataAsync(AlbumData albumData)

And it fails even with valid PO tokens (mine come from bgutil v1.3.1):
Created YouTube client with: Tokens: Valid, Cookies: 22 cookies

So this looks upstream in the YouTubeMusicAPI signature deciphering against
YouTube's current player JS, independent of token state.

[DaniNotFound702]

What is the best thing we can do?

[TypNull]

What is the best thing we can do?

I can investigate it, but this appears to be an upstream issue. Filing a report on the YouTube API repository could be a helpful next step.

[Calrissian45]

I opened an upstream issue on YouTubeMusicAPI here:

IcySnex/YouTubeMusicAPI#49

[DaniNotFound702]

Any update's on this?

[TypNull]

Any update's on this?

He mentioned he has exams, so I think it’s important to respect that. If you’d like to fix it, I’m sure he’d welcome a PR

[DaniNotFound702]

He mentioned he has exams, so I think it’s important to respect that. If you’d like to fix it, I’m sure he’d welcome a PR

O i did not know that, i will wait :)

[Calrissian45]

YouTubeMusicAPI issue #49 reports that the "Cannot read property 'call' of undefined" bug and several related 403 issues have now been fixed in the latest library version.

I retested Tubifarry v2.1.1, and it still produces the same Player.Decipher error, so Tubifarry appears to still be using the older YouTubeMusicAPI dependency. The next step is for Tubifarry to update to the fixed upstream version.

[TypNull]

This will be updated in the next release. I plan to deploy it once my FFmpeg modifications are tested and working.

[TypNull]

I pushed the changes to develop.

[taylormock03]

@TypNull What version did you test this fix in? I'm currently running 2.2.0.2 (develop) and I am still seeing these issues

2026-08-02 13:27:26.2|Debug|YouTubeParser|Failed to enrich album data for: 'Cyberpunk 2077: More Music from Night City Radio (Original Soundtrack)'

[v3.1.3.4975] System.ArgumentNullException: Requiered token is null. (Parameter 'buttons[2].musicPlayButtonRenderer.playNavigationEndpoint.watchPlaylistEndpoint.playlistId')
   at YouTubeMusicAPI.Internal.Selectors.SelectObject[T](JToken value, String path)
   at YouTubeMusicAPI.Internal.Parsers.InfoParser.GetAlbum(JObject jsonToken)
   at YouTubeMusicAPI.Client.YouTubeMusicClient.GetAlbumInfoAsync(String browseId, CancellationToken cancellationToken)
   at Tubifarry.Indexers.YouTube.YouTubeParser.EnrichAlbumWithYouTubeDataAsync(AlbumData albumData)


2026-08-02 13:27:26.2|Trace|YouTubeParser|Added album: 'Cyberpunk 2077: More Music from Night City Radio (Original Soundtrack)' by 'Various Artists' (Bitrate: 128kbps)
2026-08-02 13:27:27.1|Debug|YouTubeParser|Failed to enrich album data for: 'Cyberpunk 2077: Phantom Liberty (Original Score)'

[v3.1.3.4975] System.ArgumentNullException: Requiered token is null. (Parameter 'buttons[2].musicPlayButtonRenderer.playNavigationEndpoint.watchPlaylistEndpoint.playlistId')
   at YouTubeMusicAPI.Internal.Selectors.SelectObject[T](JToken value, String path)
   at YouTubeMusicAPI.Internal.Parsers.InfoParser.GetAlbum(JObject jsonToken)
   at YouTubeMusicAPI.Client.YouTubeMusicClient.GetAlbumInfoAsync(String browseId, CancellationToken cancellationToken)
   at Tubifarry.Indexers.YouTube.YouTubeParser.EnrichAlbumWithYouTubeDataAsync(AlbumData albumData)


2026-08-02 13:27:27.1|Trace|YouTubeParser|Added album: 'Cyberpunk 2077: Phantom Liberty (Original Score)' by 'P.T. Adamczyk' (Bitrate: 128kbps)
2026-08-02 13:27:27.3|Trace|HttpClient|Req: [GET] https://musicbrainz.org/ws/2/release-group/fdc49199-1822-30cb-b8d7-5816b9e79845
2026-08-02 13:27:27.3|Trace|ConfigService|Using default config value for 'proxyenabled' defaultValue:'False'
2026-08-02 13:27:27.9|Debug|YouTubeParser|Failed to enrich album data for: 'Time'

[v3.1.3.4975] System.ArgumentNullException: Requiered token is null. (Parameter 'buttons[2].musicPlayButtonRenderer.playNavigationEndpoint.watchPlaylistEndpoint.playlistId')
   at YouTubeMusicAPI.Internal.Selectors.SelectObject[T](JToken value, String path)
   at YouTubeMusicAPI.Internal.Parsers.InfoParser.GetAlbum(JObject jsonToken)
   at YouTubeMusicAPI.Client.YouTubeMusicClient.GetAlbumInfoAsync(String browseId, CancellationToken cancellationToken)
   at Tubifarry.Indexers.YouTube.YouTubeParser.EnrichAlbumWithYouTubeDataAsync(AlbumData albumData)

I'm happy to look into this issue and submit a PR as necessary, but I want to confirm that this isn't an issue with my deployment first

Config -

[TypNull]

I'm on the same version but can no longer reproduce this with either the local session generator or the remote one. A YouTube grab now imports cleanly:

[Info] DownloadService: Report sent to Youtube from indexer Youtube. Alligatoah - XXX (2013) [Explicit] [AAC 160kbps] [WEB]
[Info] ImportListSyncService: Starting Import List Sync
[Info] ImportListSyncService: No list items to process
[Info] ImportDecisionMaker: Reading file 1/13
[Info] ImportDecisionMaker: Reading file 2/13
[Info] ImportDecisionMaker: Reading file 3/13
[Info] ImportDecisionMaker: Reading file 4/13
[Info] ImportDecisionMaker: Reading file 5/13
[Info] ImportDecisionMaker: Reading file 6/13
[Info] ImportDecisionMaker: Reading file 7/13
[Info] ImportDecisionMaker: Reading file 8/13
...

The one thing I'd flag in your settings is that the re-encode option is set to "None," which can cause tag issues, but that's separate from the actual error here (System.ArgumentNullException: Required token is null. (Parameter 'buttons[2].musicPlayButtonRenderer.playNavigationEndpoint.watchPlaylistEndpoint.playlistId')), so it won't resolve that one.

[DaniNotFound702]

I tested again today and it worked perfect!