[Issue]: Connection failure with error: System.ArgumentNullException: Value cannot be null. (Parameter 'appName') #4271

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opened 2026-02-07 00:39:52 +03:00 by OVERLORD · 2 comments
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Originally created by @alexrtou on GitHub (Oct 12, 2022).

Please describe your bug

Hello,

I am running Jellyfin in a docker compose, I use traefik as a router.
But when I try to activate an SSO plugin (traefik-forward-auth), I am not forwarded to the SSO login, but to the Jellyfin login.
And when I login, I have this error :

[21:05:08] [ERR] [11] Jellyfin.Server.Middleware.ExceptionMiddleware: Error processing request. URL POST /Users/authenticatebyname.
System.ArgumentNullException: Value cannot be null. (Parameter 'appName')
at Emby.Server.Implementations.Session.SessionManager.LogSessionActivity(String appName, String appVersion, String deviceId, String deviceName, String remoteEndPoint, User user)
at Emby.Server.Implementations.Session.SessionManager.AuthenticateNewSessionInternal(AuthenticationRequest request, Boolean enforcePassword)
at Jellyfin.Api.Controllers.UserController.AuthenticateUserByName(AuthenticateUserByName request)
at lambda_method666(Closure , Object )
at Microsoft.AspNetCore.Mvc.Infrastructure.ActionMethodExecutor.AwaitableObjectResultExecutor.Execute(IActionResultTypeMapper mapper, ObjectMethodExecutor executor, Object controller, Object[] arguments)
at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.g__Awaited|12_0(ControllerActionInvoker invoker, ValueTask`1 actionResultValueTask)
at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.g__Awaited|10_0(ControllerActionInvoker invoker, Task lastTask, State next, Scope scope, Object state, Boolean isCompleted)
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.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.g__Awaited|17_0(ResourceInvoker invoker, Task task, IDisposable scope)
at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.g__Awaited|17_0(ResourceInvoker invoker, Task task, IDisposable scope)
at Microsoft.AspNetCore.Routing.EndpointMiddleware.g__AwaitRequestTask|6_0(Endpoint endpoint, Task requestTask, ILogger logger)
at Jellyfin.Server.Middleware.ServerStartupMessageMiddleware.Invoke(HttpContext httpContext, IServerApplicationHost serverApplicationHost, ILocalizationManager localizationManager)
at Jellyfin.Server.Middleware.WebSocketHandlerMiddleware.Invoke(HttpContext httpContext, IWebSocketManager webSocketManager)
at Jellyfin.Server.Middleware.IpBasedAccessValidationMiddleware.Invoke(HttpContext httpContext, INetworkManager networkManager)
at Jellyfin.Server.Middleware.LanFilteringMiddleware.Invoke(HttpContext httpContext, INetworkManager networkManager, IServerConfigurationManager serverConfigurationManager)
at Microsoft.AspNetCore.Authorization.AuthorizationMiddleware.Invoke(HttpContext context)
at Jellyfin.Server.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.Server.Middleware.RobotsRedirectionMiddleware.Invoke(HttpContext httpContext)
at Jellyfin.Server.Middleware.LegacyEmbyRouteRewriteMiddleware.Invoke(HttpContext httpContext)
at Microsoft.AspNetCore.ResponseCompression.ResponseCompressionMiddleware.InvokeCore(HttpContext context)
at Jellyfin.Server.Middleware.ResponseTimeMiddleware.Invoke(HttpContext context, IServerConfigurationManager serverConfigurationManager)
at Jellyfin.Server.Middleware.ExceptionMiddleware.Invoke(HttpContext context)

Jellyfin Version

Other

if other:

10.8.5

Environment

- OS:arch linux
- Virtualization:docker
- Clients:Browser
- Browser:firefox/chromium
- FFmpeg Version:N/A
- Playback Method:N/A
- Hardware Acceleration:N/A
- Plugins:none
- Reverse Proxy:traefik
- Base URL:/jellyfin/web/index.html
- Networking:NAT(not sure)
- Storage:local

Jellyfin logs

No response

FFmpeg logs

No response

Please attach any browser or client logs here

No response

Please attach any screenshots here

No response

Code of Conduct

  • I agree to follow this project's Code of Conduct
Originally created by @alexrtou on GitHub (Oct 12, 2022). ### Please describe your bug Hello, I am running Jellyfin in a docker compose, I use traefik as a router. But when I try to activate an SSO plugin (traefik-forward-auth), I am not forwarded to the SSO login, but to the Jellyfin login. And when I login, I have this error : [21:05:08] [ERR] [11] Jellyfin.Server.Middleware.ExceptionMiddleware: Error processing request. URL POST /Users/authenticatebyname. System.ArgumentNullException: Value cannot be null. (Parameter 'appName') at Emby.Server.Implementations.Session.SessionManager.LogSessionActivity(String appName, String appVersion, String deviceId, String deviceName, String remoteEndPoint, User user) at Emby.Server.Implementations.Session.SessionManager.AuthenticateNewSessionInternal(AuthenticationRequest request, Boolean enforcePassword) at Jellyfin.Api.Controllers.UserController.AuthenticateUserByName(AuthenticateUserByName request) at lambda_method666(Closure , Object ) at Microsoft.AspNetCore.Mvc.Infrastructure.ActionMethodExecutor.AwaitableObjectResultExecutor.Execute(IActionResultTypeMapper mapper, ObjectMethodExecutor executor, Object controller, Object[] arguments) at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.<InvokeActionMethodAsync>g__Awaited|12_0(ControllerActionInvoker invoker, ValueTask`1 actionResultValueTask) at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.<InvokeNextActionFilterAsync>g__Awaited|10_0(ControllerActionInvoker invoker, Task lastTask, State next, Scope scope, Object state, Boolean isCompleted) 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__Awaited|17_0(ResourceInvoker invoker, Task task, IDisposable scope) at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeAsync>g__Awaited|17_0(ResourceInvoker invoker, Task task, IDisposable scope) at Microsoft.AspNetCore.Routing.EndpointMiddleware.<Invoke>g__AwaitRequestTask|6_0(Endpoint endpoint, Task requestTask, ILogger logger) at Jellyfin.Server.Middleware.ServerStartupMessageMiddleware.Invoke(HttpContext httpContext, IServerApplicationHost serverApplicationHost, ILocalizationManager localizationManager) at Jellyfin.Server.Middleware.WebSocketHandlerMiddleware.Invoke(HttpContext httpContext, IWebSocketManager webSocketManager) at Jellyfin.Server.Middleware.IpBasedAccessValidationMiddleware.Invoke(HttpContext httpContext, INetworkManager networkManager) at Jellyfin.Server.Middleware.LanFilteringMiddleware.Invoke(HttpContext httpContext, INetworkManager networkManager, IServerConfigurationManager serverConfigurationManager) at Microsoft.AspNetCore.Authorization.AuthorizationMiddleware.Invoke(HttpContext context) at Jellyfin.Server.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.Server.Middleware.RobotsRedirectionMiddleware.Invoke(HttpContext httpContext) at Jellyfin.Server.Middleware.LegacyEmbyRouteRewriteMiddleware.Invoke(HttpContext httpContext) at Microsoft.AspNetCore.ResponseCompression.ResponseCompressionMiddleware.InvokeCore(HttpContext context) at Jellyfin.Server.Middleware.ResponseTimeMiddleware.Invoke(HttpContext context, IServerConfigurationManager serverConfigurationManager) at Jellyfin.Server.Middleware.ExceptionMiddleware.Invoke(HttpContext context) ### Jellyfin Version Other ### if other: 10.8.5 ### Environment ```markdown - OS:arch linux - Virtualization:docker - Clients:Browser - Browser:firefox/chromium - FFmpeg Version:N/A - Playback Method:N/A - Hardware Acceleration:N/A - Plugins:none - Reverse Proxy:traefik - Base URL:/jellyfin/web/index.html - Networking:NAT(not sure) - Storage:local ``` ### Jellyfin logs _No response_ ### FFmpeg logs _No response_ ### Please attach any browser or client logs here _No response_ ### Please attach any screenshots here _No response_ ### Code of Conduct - [X] I agree to follow this project's Code of Conduct
OVERLORD added the bugstale labels 2026-02-07 00:39:52 +03:00
Author
Owner

@cmsimike commented on GitHub (Nov 13, 2022):

I ran into a similar error but trying to use the API. Ultimately the issue was that I wasn't passing a required header. This is the header:

 'X-Emby-Authorization': 'MediaBrowser Client="<clientname>", Device="<devicename>", DeviceId="<randomlygeneratedid>", Version="<version>"'

Be sure that header is being passed to Jellyfin

@cmsimike commented on GitHub (Nov 13, 2022): I ran into a similar error but trying to use the API. Ultimately the issue was that I wasn't passing a required header. This is the header: ``` 'X-Emby-Authorization': 'MediaBrowser Client="<clientname>", Device="<devicename>", DeviceId="<randomlygeneratedid>", Version="<version>"' ``` Be sure that header is being passed to Jellyfin
Author
Owner

@jellyfin-bot commented on GitHub (Mar 13, 2023):

This issue has gone 120 days without comment. To avoid abandoned issues, it will be closed in 21 days if there are no new comments.

If you're the original submitter of this issue, please comment confirming if this issue still affects you in the latest release or master branch, or close the issue if it has been fixed. If you're another user also affected by this bug, please comment confirming so. Either action will remove the stale label.

This bot exists to prevent issues from becoming stale and forgotten. Jellyfin is always moving forward, and bugs are often fixed as side effects of other changes. We therefore ask that bug report authors remain vigilant about their issues to ensure they are closed if fixed, or re-confirmed - perhaps with fresh logs or reproduction examples - regularly. If you have any questions you can reach us on Matrix or Social Media.

@jellyfin-bot commented on GitHub (Mar 13, 2023): This issue has gone 120 days without comment. To avoid abandoned issues, it will be closed in 21 days if there are no new comments. If you're the original submitter of this issue, please comment confirming if this issue still affects you in the latest release or master branch, or close the issue if it has been fixed. If you're another user also affected by this bug, please comment confirming so. Either action will remove the stale label. This bot exists to prevent issues from becoming stale and forgotten. Jellyfin is always moving forward, and bugs are often fixed as side effects of other changes. We therefore ask that bug report authors remain vigilant about their issues to ensure they are closed if fixed, or re-confirmed - perhaps with fresh logs or reproduction examples - regularly. If you have any questions you can reach us on [Matrix or Social Media](https://docs.jellyfin.org/general/getting-help.html).
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Reference: starred/jellyfin#4271