I am getting following error while editing and trying to create a new product.
It was the error because I left empty "Ignored product type IDs (advanced)" while adding new product template.
An unhandled exception occurred while processing the request.
NotSupportedException: GenericListTypeConverter`1 cannot convert from (null).
Nop.Web.Framework.Infrastructure.Extensions.ApplicationBuilderExtensions+<>c.<UseNopExceptionHandler>b__1_1(HttpContext context) in ApplicationBuilderExtensions.cs, line 83
Stack Query Cookies Headers
NotSupportedException: GenericListTypeConverter`1 cannot convert from (null).
Nop.Web.Framework.Infrastructure.Extensions.ApplicationBuilderExtensions+<>c.<UseNopExceptionHandler>b__1_1(HttpContext context) in ApplicationBuilderExtensions.cs
throw exception;
Microsoft.AspNetCore.Diagnostics.ExceptionHandlerMiddleware.Invoke(HttpContext context)
Microsoft.AspNetCore.Diagnostics.ExceptionHandlerMiddleware.Invoke(HttpContext context)
Microsoft.AspNetCore.Diagnostics.DeveloperExceptionPageMiddleware.Invoke(HttpContext context)
System.NotSupportedException: GenericListTypeConverter`1 cannot convert from (null).
at Nop.Web.Framework.Infrastructure.Extensions.ApplicationBuilderExtensions.<>c.<UseNopExceptionHandler>b__1_1(HttpContext context) in Presentation\Nop.Web.Framework\Infrastructure\Extensions\ApplicationBuilderExtensions.cs:line 83
at Microsoft.AspNetCore.Diagnostics.ExceptionHandlerMiddleware.Invoke(HttpContext context)
at Microsoft.AspNetCore.Diagnostics.ExceptionHandlerMiddleware.Invoke(HttpContext context)
at Microsoft.AspNetCore.Diagnostics.DeveloperExceptionPageMiddleware.Invoke(HttpContext context)