fix

src/InternshipSystem.Api/Controllers/InternshipController.cs

@@ -45,6 +45,7 @@ namespace InternshipSystem.Api.Controllers
                 .Include(i => i.InternshipRegistration.BranchAddress)
                 .Include(i => i.InternshipRegistration.Type)
                 .Include(i => i.InternshipRegistration.Subjects)
+                .ThenInclude(subject => subject.Subject)
                 .Include(i => i.Report)
                 .Include(i => i.Documentation)
                 .SingleAsync(i => i.Student.Id == user.PersonNumber, cancellationToken);