починила

University/UniversityClientApp/Controllers/HomeController.cs

@@ -36,6 +36,7 @@ namespace UniversityClientApp.Controllers
         {
             return View();
         }
+
         private ClientViewModel Client
         {
             get

University/UniversityClientApp/Program.cs

@@ -15,10 +15,10 @@ var builder = WebApplication.CreateBuilder(args);
 // Add services to the container.
 builder.Services.AddControllersWithViews();
 builder.Services.AddSession(); // Äîáàâëÿåì ñåññèþ äëÿ àâòîðèçàöèè
-
 builder.Services.AddTransient<IClientLogic, ClientLogic>();
 builder.Services.AddTransient<IPurchaseLogic, PurchaseLogic>();
 builder.Services.AddTransient<IOperationLogic, OperationLogic>();
+builder.Services.AddTransient<IReportLogic, ReportLogic>();
 builder.Services.AddTransient<IPaymentLogic, PaymentLogic>();
 
 builder.Services.AddTransient<AbstractSaveToWord, SaveToWord>();