title: Mark up with unexpected name in blazor app?
body: <p>Trying to establish user accounts in my blazor web assembly app and build an element of authentication.</p>
  
  <p>However, two components have the error:</p>
  
  <pre><code>Found markup element with unexpected name 'xxxxxxxxxxxxxxxx'
  </code></pre>
  
  <p>The two problematic components are AuthorizeRouteView and CascadingAuthenticationState.</p>
  
  <p>My code: </p>
  
  <pre><code>&lt;Router AppAssembly="@typeof(Program).Assembly"&gt;
      &lt;Found Context="routeData"&gt;
          &lt;AuthorizeRouteView RouteData="@routeData" DefaultLayout="@typeof(MainLayout)" /&gt;
      &lt;/Found&gt;
      &lt;NotFound&gt;
          &lt;CascadingAuthenticationState&gt;
              &lt;LayoutView Layout="@typeof(MainLayout)"&gt;
                  &lt;p&gt;Sorry, there's nothing at this address.&lt;/p&gt;
              &lt;/LayoutView&gt;
          &lt;/CascadingAuthenticationState&gt;
      &lt;/NotFound&gt;
  &lt;/Router&gt;
  </code></pre>
  
  <p>Any clue what might be wrong? </p>