diff --git a/framework/src/Volo.Abp.UI.Navigation/Volo/Abp/Ui/Navigation/Urls/AppUrlProvider.cs b/framework/src/Volo.Abp.UI.Navigation/Volo/Abp/Ui/Navigation/Urls/AppUrlProvider.cs
index d845f983ab..b8bebd95a5 100644
--- a/framework/src/Volo.Abp.UI.Navigation/Volo/Abp/Ui/Navigation/Urls/AppUrlProvider.cs
+++ b/framework/src/Volo.Abp.UI.Navigation/Volo/Abp/Ui/Navigation/Urls/AppUrlProvider.cs
@@ -60,7 +60,7 @@ public class AppUrlProvider : IAppUrlProvider, ITransientDependency
             return url;
         }
         
-        return await ReplacePlaceHoldersAsync(url);
+        return await ReplacePlaceHoldersAsync(url!);
     }
 
     protected virtual async Task<string> GetConfiguredUrl(string appName, string? urlName)