System.NullReferenceException: 'Object reference not set to an instance of an object.'

I am working on a new plugin on nopCommerce 4.10, I got my plugin install and created the table and columns. When I go to click Configure I get the famous Object reference not set to an instance of an object

System.NullReferenceException
  HResult=0x80004003
  Message=Object reference not set to an instance of an object.
  Source=Nop.Web.Framework
  StackTrace:
   at Nop.Web.Framework.Infrastructure.Extensions.ApplicationBuilderExtensions.<>c.<UseNopExceptionHandler>b__1_1(HttpContext context) in C:\Sandbox\nopCommerce_4.10_Source\Presentation\Nop.Web.Framework\Infrastructure\Extensions\ApplicationBuilderExtensions.cs:line 83
   at Microsoft.AspNetCore.Diagnostics.ExceptionHandlerMiddleware.<Invoke>d__6.MoveNext()

Here is a screenshot of my VS http://prntscr.com/nomcwo

I did all right so far with debugging but this one it does not point me to where the issue is.

The inner exception doesn't get carried on when the exception gets re-thrown here. This has been fixed in v4.2. You can find the fix here: https://github.com/nopSolutions/nopCommerce/blob/develop/src/Presentation/Nop.Web.Framework/Infrastructure/Extensions/ApplicationBuilderExtensions.cs#L86-L92

Thanks for your reply that fixed that issue.

cheers