Redirect with Object reference not set to an instance of an object

PowerShell Universal
1

We are migrating from powershell universal 2.12.2 to 3.8.8. We have created a dashboard with the default blank template that is assigned to the url /. When I login with my Azure identity, and I try to head to https://localhost/, i will get Object reference not set to an instance of an object.. When heading to https://localhost/pagename I will get the page. The page itself does not need roles. When this is done with the local user (I am using admin with the unchanged password), then I will be redirected to the pagename.

The error in the logs:

System.NullReferenceException: Object reference not set to an instance of an object.
   at Universal.Server.Middleware.RoutingMiddleware.<>c.<Invoke>b__10_1(Role m) in C:\actions-runner\_work\universal\universal\src\Universal.Server\Middleware\RoutingMiddleware.cs:line 85
   at System.Linq.Enumerable.TryGetFirst[TSource](IEnumerable`1 source, Func`2 predicate, Boolean& found)
   at Universal.Server.Middleware.RoutingMiddleware.Invoke(HttpContext httpContext, IPolicyEvaluator policyEvaluator) in C:\actions-runner\_work\universal\universal\src\Universal.Server\Middleware\RoutingMiddleware.cs:line 85
   at Swashbuckle.AspNetCore.SwaggerUI.SwaggerUIMiddleware.Invoke(HttpContext httpContext)
   at Swashbuckle.AspNetCore.Swagger.SwaggerMiddleware.Invoke(HttpContext httpContext, ISwaggerProvider swaggerProvider)
   at Universal.Server.Middleware.SwaggerAuthenticationMiddleware.InvokeAsync(HttpContext context, RequestDelegate next) in C:\actions-runner\_work\universal\universal\src\Universal.Server\Middleware\SwaggerAuthMiddleware.cs:line 37
   at Microsoft.AspNetCore.Builder.UseMiddlewareExtensions.<>c__DisplayClass6_1.<<UseMiddlewareInterface>b__1>d.MoveNext()
--- End of stack trace from previous location ---
   at AspNetCoreRateLimit.RateLimitMiddleware`1.Invoke(HttpContext context) in C:\actions-runner\_work\universal\universal\src\AspNetCoreRateLimit\Middleware\RateLimitMiddleware.cs:line 109
   at Microsoft.AspNetCore.Session.SessionMiddleware.Invoke(HttpContext context)
   at Microsoft.AspNetCore.Session.SessionMiddleware.Invoke(HttpContext context)
   at Microsoft.AspNetCore.Diagnostics.ExceptionHandlerMiddleware.<Invoke>g__Awaited|6_0(ExceptionHandlerMiddleware middleware, HttpContext context, Task task)

This seems to be a bug…

Product: PowerShell Universal
Version: 3.8.8
2

I can reproduce this. It seems to go away after the server fully starts up. Do you have a similar experience?

3

The problem is always, i’ve just spun up PU and waited almost 10 mins to be sure.

[08:10:38 INF] PowerShell Universal performance counters do not exist.
[08:19:42 ERR] An unhandled exception has occurred while executing the request.
System.NullReferenceException: Object reference not set to an instance of an object.
   at Universal.Server.Middleware.RoutingMiddleware.<>c.<Invoke>b__10_1(Role m) in C:\actions-runner\_work\universal\universal\src\Universal.Server\Middleware\RoutingMiddleware.cs:line 85
   at System.Linq.Enumerable.TryGetFirst[TSource](IEnumerable`1 source, Func`2 predicate, Boolean& found)
   at Universal.Server.Middleware.RoutingMiddleware.Invoke(HttpContext httpContext, IPolicyEvaluator policyEvaluator) in C:\actions-runner\_work\universal\universal\src\Universal.Server\Middleware\RoutingMiddleware.cs:line 85
   at Swashbuckle.AspNetCore.SwaggerUI.SwaggerUIMiddleware.Invoke(HttpContext httpContext)
   at Swashbuckle.AspNetCore.Swagger.SwaggerMiddleware.Invoke(HttpContext httpContext, ISwaggerProvider swaggerProvider)
   at Universal.Server.Middleware.SwaggerAuthenticationMiddleware.InvokeAsync(HttpContext context, RequestDelegate next) in C:\actions-runner\_work\universal\universal\src\Universal.Server\Middleware\SwaggerAuthMiddleware.cs:line 35
   at Microsoft.AspNetCore.Builder.UseMiddlewareExtensions.<>c__DisplayClass6_1.<<UseMiddlewareInterface>b__1>d.MoveNext()
--- End of stack trace from previous location ---
   at AspNetCoreRateLimit.RateLimitMiddleware`1.Invoke(HttpContext context) in C:\actions-runner\_work\universal\universal\src\AspNetCoreRateLimit\Middleware\RateLimitMiddleware.cs:line 109
   at Microsoft.AspNetCore.Session.SessionMiddleware.Invoke(HttpContext context)
   at Microsoft.AspNetCore.Session.SessionMiddleware.Invoke(HttpContext context)
   at Microsoft.AspNetCore.Diagnostics.ExceptionHandlerMiddleware.<Invoke>g__Awaited|6_0(ExceptionHandlerMiddleware middleware, HttpContext context, Task task)
4

Ok. I will see if we can track down why this happens.

1 Like
5

When using an authentication.ps1, the problem is not there. See Unable to manage admin

We did not use the authentication.ps1, because it was being configured through appsettings.json (or actually environment variables).

6

Ok. Thank you. I’ll add this to our investigation. We did put in a first for the issue I was seeing on startup but I’m not 100% sure it’s the same thing you are seeing based on the info you provided.