поправил настройки для роли

NewStores/Store/Controllers/AccountsController.cs

@@ -103,7 +103,7 @@ public class AccountsController : Controller
         var claims = new List<Claim>
         {
             new Claim(ClaimsIdentity.DefaultNameClaimType, user.Email),
-            new Claim(ClaimsIdentity.DefaultNameClaimType, user.Role?.Name)
+            new Claim(ClaimsIdentity.DefaultRoleClaimType, user.Role?.Name)
         };
         ClaimsIdentity id = new ClaimsIdentity(
             claims,

NewStores/Store/Controllers/HomeController.cs

@@ -20,7 +20,7 @@ public class HomeController : Controller
         return View();
     }
 
-    [Authorize(Roles = "admin, user")]
+    [Authorize(Roles = "admin")]
     public IActionResult Privacy()
     {
         return View();