nullreference exception on '"Jellyfin.Api.Controllers.TvShowsController.GetSeasons

[prahal]

Could you help me find why jellyfin always error oiut to kodi jellyfin plugin making it fail to sync the library that contains this tv show ?
This tv shows displays and playback fine in jellyfin web.


Jellyfin 10.9.7


Jellyfin error on access to the seasons path by kodi jellyfin plugin

Code:

[2024-07-18 00:00:07.511 +00:00] [INF] [23] Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker: Executed action "Jellyfin.Api.Controllers.TvShowsController.GetSeasons (Jellyfin.Api)" in 8.4897ms
[2024-07-18 00:00:07.512 +00:00] [INF] [23] Microsoft.AspNetCore.Routing.EndpointMiddleware: Executed endpoint '"Jellyfin.Api.Controllers.TvShowsController.GetSeasons (Jellyfin.Api)"'
[2024-07-18 00:00:07.513 +00:00] [ERR] [23] Jellyfin.Api.Middleware.ExceptionMiddleware: Error processing request. URL "GET" "/Shows/89aa0dc336d6fdc97cca14dc9cf86421/Seasons".
System.NullReferenceException: Object reference not set to an instance of an object.
  at MediaBrowser.Controller.Entities.Folder.GetItems(InternalItemsQuery query)
  at MediaBrowser.Controller.Entities.Folder.GetRecursiveChildCount(User user)
  at MediaBrowser.Controller.Entities.Folder.FillUserDataDtoValues(UserItemDataDto dto, UserItemData userData, BaseItemDto itemDto, User user, DtoOptions fields)
  at Emby.Server.Implementations.Dto.DtoService.AttachUserSpecificInfo(BaseItemDto dto, BaseItem item, User user, DtoOptions options)
  at Emby.Server.Implementations.Dto.DtoService.GetBaseItemDtoInternal(BaseItem item, DtoOptions options, User user, BaseItem owner)
  at Emby.Server.Implementations.Dto.DtoService.GetBaseItemDtos(IReadOnlyList`1 items, DtoOptions options, User user, BaseItem owner)
  at Jellyfin.Api.Controllers.TvShowsController.GetSeasons(Guid seriesId, Nullable`1 userId, ItemFields[] fields, Nullable`1 isSpecialSeason, Nullable`1 isMissing, Nullable`1 adjacentTo, Nullable`1 enableImages, Nullable`1 imageTypeLimit, ImageType[] enableImageTypes, Nullable`1 enableUserData)
  at lambda_method907(Closure, Object, Object[])
  at Microsoft.AspNetCore.Mvc.Infrastructure.ActionMethodExecutor.SyncObjectResultExecutor.Execute(ActionContext actionContext, IActionResultTypeMapper mapper, ObjectMethodExecutor executor, Object controller, Object[] arguments)
  at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.InvokeActionMethodAsync()
  at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.Next(State& next, Scope& scope, Object& state, Boolean& isCompleted)
  at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.InvokeNextActionFilterAsync()
--- End of stack trace from previous location ---
  at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.Rethrow(ActionExecutedContextSealed context)
  at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.Next(State& next, Scope& scope, Object& state, Boolean& isCompleted)
  at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.InvokeInnerFilterAsync()
--- End of stack trace from previous location ---
  at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeNextResourceFilter>g__Awaited|25_0(ResourceInvoker invoker, Task lastTask, State next, Scope scope, Object state, Boolean isCompleted)
  at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.Rethrow(ResourceExecutedContextSealed context)
  at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.Next(State& next, Scope& scope, Object& state, Boolean& isCompleted)
  at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.InvokeFilterPipelineAsync()
--- End of stack trace from previous location ---
  at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeAsync>g__Logged|17_1(ResourceInvoker invoker)
  at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeAsync>g__Logged|17_1(ResourceInvoker invoker)
  at Microsoft.AspNetCore.Routing.EndpointMiddleware.<Invoke>g__AwaitRequestTask|7_0(Endpoint endpoint, Task requestTask, ILogger logger)
  at Jellyfin.Api.Middleware.ServerStartupMessageMiddleware.Invoke(HttpContext httpContext, IServerApplicationHost serverApplicationHost, ILocalizationManager localizationManager)
  at Jellyfin.Api.Middleware.WebSocketHandlerMiddleware.Invoke(HttpContext httpContext, IWebSocketManager webSocketManager)
  at Jellyfin.Api.Middleware.IPBasedAccessValidationMiddleware.Invoke(HttpContext httpContext, INetworkManager networkManager)
  at Jellyfin.Api.Middleware.LanFilteringMiddleware.Invoke(HttpContext httpContext, INetworkManager networkManager, IServerConfigurationManager serverConfigurationManager)
  at Microsoft.AspNetCore.Authorization.AuthorizationMiddleware.Invoke(HttpContext context)
  at Jellyfin.Api.Middleware.QueryStringDecodingMiddleware.Invoke(HttpContext httpContext)
  at Swashbuckle.AspNetCore.ReDoc.ReDocMiddleware.Invoke(HttpContext httpContext)
  at Swashbuckle.AspNetCore.SwaggerUI.SwaggerUIMiddleware.Invoke(HttpContext httpContext)
  at Swashbuckle.AspNetCore.Swagger.SwaggerMiddleware.Invoke(HttpContext httpContext, ISwaggerProvider swaggerProvider)
  at Microsoft.AspNetCore.Authentication.AuthenticationMiddleware.Invoke(HttpContext context)
  at Jellyfin.Api.Middleware.RobotsRedirectionMiddleware.Invoke(HttpContext httpContext)
  at Jellyfin.Api.Middleware.LegacyEmbyRouteRewriteMiddleware.Invoke(HttpContext httpContext)
  at Microsoft.AspNetCore.ResponseCompression.ResponseCompressionMiddleware.InvokeCore(HttpContext context)
  at Jellyfin.Api.Middleware.ResponseTimeMiddleware.Invoke(HttpContext context, IServerConfigurationManager serverConfigurationManager)
  at Jellyfin.Api.Middleware.ExceptionMiddleware.Invoke(HttpContext context)
[2024-07-18 00:00:07.515 +00:00] [INF] [23] Microsoft.AspNetCore.Hosting.Diagnostics: Request finished "HTTP/1.1" "GET" "http"://"192.168.10.48:8096""""/Shows/89aa0dc336d6fdc97cca14dc9cf86421/Seasons""?UserId=f0f250cf42a24340b5634087be9de6ad&EnableImages=True&Fields=Path%2CGenres%2CSortName%2CStudios%2CWriter%2CTaglines%2CLocalTrailerCount%2COfficialRating%2CCumulativeRunTimeTicks%2CItemCounts%2CMetascore%2CAirTime%2CDateCreated%2CPeople%2COverview%2CEtag%2CShortOverview%2CProductionLocations%2CTags%2CProviderIds%2CParentId%2CRemoteTrailers%2CSpecialEpisodeNumbers%2CMediaSources%2CVoteCount%2CRecursiveItemCount%2CPrimaryImageAspectRatio" - 500 null "text/plain" 14.7975ms

Kodi jellyfin logs

Code:

2024-07-18 01:39:47.290 T:1078    info <general>: JELLYFIN.jellyfin_kodi.jellyfin.http -> ERROR::jellyfin_kodi/jellyfin/http.py:131 500 Server Error: Internal Server Error for url: http://{jellyfin-server}/Shows/89aa0dc336d6fdc97cca14dc9cf86421/Seasons?UserId=f0f250cf42a24340b5634087be9de6ad&EnableImages=True&Fields=Path%2CGenres%2CSortName%2CStudios%2CWriter%2CTaglines%2CLocalTrailerCount%2COfficialRating%2CCumulativeRunTimeTicks%2CItemCounts%2CMetascore%2CAirTime%2CDateCreated%2CPeople%2COverview%2CEtag%2CShortOverview%2CProductionLocations%2CTags%2CProviderIds%2CParentId%2CRemoteTrailers%2CSpecialEpisodeNumbers%2CMediaSources%2CVoteCount%2CRecursiveItemCount%2CPrimaryImageAspectRatio                                        2024-07-18 01:39:47.298 T:1078    info <general>: JELLYFIN.jellyfin_kodi.jellyfin.http -> ERROR::jellyfin_kodi/jellyfin/http.py:160 --[ 500 response ] 500 Server Error: Internal Server Error for url: http://{jellyfin-server}/Shows/89aa0dc336d6fdc97cca14dc9cf86421/Seasons?UserId=f0f250cf42a24340b5634087be9de6ad&EnableImages=True&Fields=Path%2CGenres%2CSortName%2CStudios%2CWriter%2CTaglines%2CLocalTrailerCount%2COfficialRating%2CCumulativeRunTimeTicks%2CItemCounts%2CMetascore%2CAirTime%2CDateCreated%2CPeople%2COverview%2CEtag%2CShortOverview%2CProductionLocations%2CTags%2CProviderIds%2CParentId%2CRemoteTrailers%2CSpecialEpisodeNumbers%2CMediaSources%2CVoteCount%2CRecursiveItemCount%2CPrimaryImageAspectRatio                      2024-07-18 01:39:47.305 T:1078    info <general>: JELLYFIN.jellyfin_kodi.database -> ERROR::jellyfin_kodi/database/__init__.py:171 type: <class 'TypeError'> value: 'NoneType' object is not subscriptable

[TheDreadPirate]

Does it only happen for a particular TV show or all shows? Can you provide examples of the folder and file structure?

[prahal]

From my notes this was a show I had only one episode of i.e. the simpsons season 11 "The Simpsons 11x12 - Britney Spears & Mr. Burns.asf"

The structure was likely (I removed the file from the jellyfin storage back then to get the scanning from jellyfin kodi back to a working state) /media/movies/Series/Anime/Les Simpson (1989)/Season 11/<the asf file>
with the library setup to import from /media/movies/Series/Anime/ i.e. Les Simpson (1989)/ was at the root.

Somehow I miss the notification of your reply (maybe I forbot to check the box to get a notification).

But I had too many other bugs with jellyfin, so I was unable to focus on only this one. Consider this issue as abandoned until better times, ieI deleted all excepted libraries config/root and config/plugins and did the setup anew. After that, I still have a few bug that prevents me from focusing back on this one.