Object reference not set to an instance of an object error.

[commodus]

Hello,

I’m using version 8.0.0 of the Ardalis.Specification library. When the CreateBrandRequest event is triggered as shown in the screenshot, the FluentValidation implemented CreateBrandRequestValidator method runs. The IReadRepository _repository is injected and is not null, and the name parameter is not null, but when I call the repository method with the BrandByNameSpec parameter on line 27, I get a System.NullReferenceException: 'Object reference not set to an instance of an object.' error on this line. I would appreciate your help. Thank you.

Stack Trace :
at Microsoft.EntityFrameworkCore.Query.Internal.QueryCompiler.ExecuteAsync[TResult](Expression query, CancellationToken cancellationToken)
at Microsoft.EntityFrameworkCore.Query.Internal.EntityQueryProvider.ExecuteAsync[TResult](Expression expression, CancellationToken cancellationToken)
at Microsoft.EntityFrameworkCore.EntityFrameworkQueryableExtensions.ExecuteAsync[TSource,TResult](MethodInfo operatorMethodInfo, IQueryable1 source, Expression expression, CancellationToken cancellationToken) at Microsoft.EntityFrameworkCore.EntityFrameworkQueryableExtensions.ExecuteAsync[TSource,TResult](MethodInfo operatorMethodInfo, IQueryable1 source, CancellationToken cancellationToken)
at Microsoft.EntityFrameworkCore.EntityFrameworkQueryableExtensions.FirstOrDefaultAsync[TSource](IQueryable1 source, CancellationToken cancellationToken) at Ardalis.Specification.EntityFrameworkCore.RepositoryBase1.d__15.MoveNext()
at JTR.WebApi.Application.Catalog.Brands.CreateBrandRequestValidator.<>c__DisplayClass1_0.<<-ctor>b__1>d.MoveNext()