title: How to support multiple browser tabs on Blazor Server app in Windows 10 IIS?
body: <p>I published my Blazor server app to my local IIS on Windows 10. It works well, but I am no able to open more than one window/tab of the website. If I try, it loads forever until I close my former app window.</p>
  <p>Is this behavior due to SignalR on Windows 10 being limited? Or am I missing something?
  Other than that, the app compiles and works as expected.</p>
  <p>The application pool is on No Managed Code, Integrated. IIS 10.</p>
  <p><strong>Update</strong></p>
  <p>This does not happen with IIS Express, only on local IIS.</p>
  <p>Appsettings.json:</p>
  <pre><code>{
    &quot;Logging&quot;: {
      &quot;LogLevel&quot;: {
        &quot;Default&quot;: &quot;Information&quot;,
        &quot;Microsoft&quot;: &quot;Warning&quot;,
        &quot;Microsoft.Hosting.Lifetime&quot;: &quot;Information&quot;
      }
    },
    &quot;AllowedHosts&quot;: &quot;*&quot;,
    &quot;env&quot;: &quot;dev&quot;,
    &quot;connStrDev&quot;: &quot;my dev conn&quot;,
    &quot;connStrTest&quot;: &quot;my test conn&quot;,
    &quot;BaseUrl&quot;: &quot;http://localhost/MyProjectName/&quot;
  }
  </code></pre>
  <p>App.Razor:</p>
  <pre><code>&lt;Router AppAssembly=&quot;@typeof(Program).Assembly&quot;&gt;
      &lt;Found Context=&quot;routeData&quot;&gt;
          &lt;RouteView RouteData=&quot;@routeData&quot; DefaultLayout=&quot;@typeof(MainLayout)&quot; /&gt;
      &lt;/Found&gt;
      &lt;NotFound&gt;
          &lt;LayoutView Layout=&quot;@typeof(MainLayout)&quot;&gt;
              &lt;p&gt;Sorry, there's nothing at this address.&lt;/p&gt;
          &lt;/LayoutView&gt;
      &lt;/NotFound&gt;
  &lt;/Router&gt;
  </code></pre>
  <p>MainLayout.razor:</p>
  <pre><code>@inherits LayoutComponentBase
  @using Domain.Models.Static 
  &lt;head&gt;
  
  &lt;/head&gt;
  &lt;div class=&quot;sidebar col-lg-3 &quot; &gt;
      &lt;div class=&quot;logo&quot;&gt;TeamApp Manager&lt;/div&gt;
      &lt;hr style=&quot;background-color:white;&quot; /&gt;
      &lt;UserList/&gt;
  &lt;/div&gt;
  
  &lt;div class=&quot;main&quot; dir=&quot;ltr&quot;&gt;
      &lt;div class=&quot;top-row px-4&quot;&gt;
          &lt;HeadMenu /&gt;
      &lt;/div&gt;
  
      &lt;div class=&quot;content px-4&quot;&gt;
  
          @Body
      &lt;/div&gt;
  &lt;/div&gt;
  </code></pre>
  <p>This should be working like any normal IIS web app. Any ideas? Again, the code itself runs fine on local IIS but would not start on a 2nd browser tab or window.</p>
  <p>Desired Behavior: App working correctly on local IIS.</p>