An unhandled exception occurred while processing the request.
InvalidOperationException: Null TypeMapping in Sql Tree

Microsoft.EntityFrameworkCore.Query.RelationalSqlTranslatingExpressionVisitor+SqlTypeMappingVerifyingExpressionVisitor.VisitExtension(Expression node)

    Stack Query Cookies Headers Routing 

    InvalidOperationException: Null TypeMapping in Sql Tree
        Microsoft.EntityFrameworkCore.Query.RelationalSqlTranslatingExpressionVisitor+SqlTypeMappingVerifyingExpressionVisitor.VisitExtension(Expression node)
        System.Linq.Expressions.Expression.Accept(ExpressionVisitor visitor)
        System.Linq.Expressions.ExpressionVisitor.Visit(Expression node)
        Microsoft.EntityFrameworkCore.Query.RelationalSqlTranslatingExpressionVisitor.Translate(Expression expression)
        Microsoft.EntityFrameworkCore.Query.Internal.RelationalProjectionBindingExpressionVisitor.Visit(Expression expression)
        Microsoft.EntityFrameworkCore.Query.Internal.RelationalProjectionBindingExpressionVisitor.VisitMemberAssignment(MemberAssignment memberAssignment)
        System.Linq.Expressions.ExpressionVisitor.VisitMemberBinding(MemberBinding node)
        Microsoft.EntityFrameworkCore.Query.Internal.RelationalProjectionBindingExpressionVisitor.VisitMemberInit(MemberInitExpression memberInitExpression)
        System.Linq.Expressions.MemberInitExpression.Accept(ExpressionVisitor visitor)
        System.Linq.Expressions.ExpressionVisitor.Visit(Expression node)
        Microsoft.EntityFrameworkCore.Query.Internal.RelationalProjectionBindingExpressionVisitor.Visit(Expression expression)
        Microsoft.EntityFrameworkCore.Query.Internal.RelationalProjectionBindingExpressionVisitor.Translate(SelectExpression selectExpression, Expression expression)
        Microsoft.EntityFrameworkCore.Query.RelationalQueryableMethodTranslatingExpressionVisitor.TranslateSelect(ShapedQueryExpression source, LambdaExpression selector)
        Microsoft.EntityFrameworkCore.Query.QueryableMethodTranslatingExpressionVisitor.VisitMethodCall(MethodCallExpression methodCallExpression)
        Microsoft.EntityFrameworkCore.Query.RelationalQueryableMethodTranslatingExpressionVisitor.VisitMethodCall(MethodCallExpression methodCallExpression)
        System.Linq.Expressions.MethodCallExpression.Accept(ExpressionVisitor visitor)
        System.Linq.Expressions.ExpressionVisitor.Visit(Expression node)
        Microsoft.EntityFrameworkCore.Query.QueryCompilationContext.CreateQueryExecutor<TResult>(Expression query)
        Microsoft.EntityFrameworkCore.Storage.Database.CompileQuery<TResult>(Expression query, bool async)
        Microsoft.EntityFrameworkCore.Query.Internal.QueryCompiler.CompileQueryCore<TResult>(IDatabase database, Expression query, IModel model, bool async)
        Microsoft.EntityFrameworkCore.Query.Internal.QueryCompiler+<>c__DisplayClass9_0<TResult>.<Execute>b__0()
        Microsoft.EntityFrameworkCore.Query.Internal.CompiledQueryCache.GetOrAddQueryCore<TFunc>(object cacheKey, Func<Func<QueryContext, TFunc>> compiler)
        Microsoft.EntityFrameworkCore.Query.Internal.CompiledQueryCache.GetOrAddQuery<TResult>(object cacheKey, Func<Func<QueryContext, TResult>> compiler)
        Microsoft.EntityFrameworkCore.Query.Internal.QueryCompiler.Execute<TResult>(Expression query)
        Microsoft.EntityFrameworkCore.Query.Internal.EntityQueryProvider.Execute<TResult>(Expression expression)
        Microsoft.EntityFrameworkCore.Query.Internal.EntityQueryable<TResult>.GetEnumerator()
        System.Collections.Generic.List<T>..ctor(IEnumerable<T> collection)
        System.Linq.Enumerable.ToList<TSource>(IEnumerable<TSource> source)
        RPM.Services.Data.Cars.CarService.GetTopCars<TViewModel>(int count) in CarService.cs

                var cars = this.context.Cars

RPM.Web.Controllers.HomeController.Index() in HomeController.cs

                    var cars = this.carsService.GetTopCars<HomePageCarViewModel>(2);
    lambda_method(Closure , object , object[] )
    Microsoft.Extensions.Internal.ObjectMethodExecutor.Execute(object target, object[] parameters)
    Microsoft.AspNetCore.Mvc.Infrastructure.ActionMethodExecutor+SyncActionResultExecutor.Execute(IActionResultTypeMapper mapper, ObjectMethodExecutor executor, object controller, object[] arguments)
    Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.InvokeActionMethodAsync()
    Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.Next(ref State next, ref Scope scope, ref object state, ref bool isCompleted)
    Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.InvokeNextActionFilterAsync()
    Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.Rethrow(ActionExecutedContextSealed context)
    Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.Next(ref State next, ref Scope scope, ref object state, ref bool isCompleted)
    Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.InvokeInnerFilterAsync()
    Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeNextResourceFilter>g__Awaited|24_0(ResourceInvoker invoker, Task lastTask, State next, Scope scope, object state, bool isCompleted)
    Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.Rethrow(ResourceExecutedContextSealed context)
    Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.Next(ref State next, ref Scope scope, ref object state, ref bool isCompleted)
    Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.InvokeFilterPipelineAsync()
    Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeAsync>g__Awaited|17_0(ResourceInvoker invoker, Task task, IDisposable scope)
    Microsoft.AspNetCore.Routing.EndpointMiddleware.<Invoke>g__AwaitRequestTask|6_0(Endpoint endpoint, Task requestTask, ILogger logger)
    Microsoft.AspNetCore.Authorization.AuthorizationMiddleware.Invoke(HttpContext context)
    Microsoft.AspNetCore.Authentication.AuthenticationMiddleware.Invoke(HttpContext context)
    Microsoft.AspNetCore.Diagnostics.EntityFrameworkCore.MigrationsEndPointMiddleware.Invoke(HttpContext context)
    Microsoft.AspNetCore.Diagnostics.EntityFrameworkCore.DatabaseErrorPageMiddleware.Invoke(HttpContext httpContext)
    Microsoft.AspNetCore.Diagnostics.EntityFrameworkCore.DatabaseErrorPageMiddleware.Invoke(HttpContext httpContext)
    Microsoft.AspNetCore.Diagnostics.DeveloperExceptionPageMiddleware.Invoke(HttpContext context)