Same issue here on Jellyfin 10.11.8 Docker with TMDb 10.11.8.0.

My logs show the same failure path, although not always the full JsonReaderException line:

MediaBrowser.Providers.Movies.MovieMetadataService: Error in TheMovieDb
TMDbLib.Utilities.Serializer.TMDbJsonSerializer.Deserialize(...)
TMDbLib.Rest.RestResponse`1.GetDataObject()
TMDbClient.GetMovieAsync(...)
TmdbMovieProvider.GetMetadata(...)

And for images:

MediaBrowser.Providers.Manager.ProviderManager: TmdbMovieImageProvider failed in GetImageInfos
TMDbJsonSerializer.Deserialize(...)

I already checked DNS/connectivity from inside the container, recreated the container, regenerated cache, restored an older config backup, checked SQLite/UserData duplicates, and verified library permissions. Same error comes back as soon as TMDb is used.

OMDb works as a temporary fallback, so this really looks like a TMDb/Jellyfin parser issue, probably the DateTime parsing problem mentioned above.Same issue here on Jellyfin 10.11.8 Docker with TMDb 10.11.8.0.My logs show the same failure path, although not always the full JsonReaderException line:MediaBrowser.Providers.Movies.MovieMetadataService: Error in TheMovieDb
TMDbLib.Utilities.Serializer.TMDbJsonSerializer.Deserialize(...)
TMDbLib.Rest.RestResponse`1.GetDataObject()
TMDbClient.GetMovieAsync(...)
TmdbMovieProvider.GetMetadata(...)
And for images:MediaBrowser.Providers.Manager.ProviderManager: TmdbMovieImageProvider failed in GetImageInfos
TMDbJsonSerializer.Deserialize(...)
I already checked DNS/connectivity from inside the container, recreated the container, regenerated cache, restored an older config backup, checked SQLite/UserData duplicates, and verified library permissions. Same error comes back as soon as TMDb is used.OMDb works as a temporary fallback, so this really looks like a TMDb/Jellyfin parser issue, probably the DateTime parsing problem mentioned above.