Update Startup.cs

src/ProjectTemplates/Web.ProjectTemplates/content/BlazorServerWeb-CSharp/Startup.cs

@@ -144,7 +144,7 @@ namespace BlazorServerWeb_CSharp
             }
             else
             {
-                app.UseExceptionHandler("/Home/Error");
+                app.UseExceptionHandler("/Error");
 #if (RequiresHttps)
                 // The default HSTS value is 30 days. You may want to change this for production scenarios, see https://aka.ms/aspnetcore-hsts.
                 app.UseHsts();