title: Angular 2 RC6 - "sidebar" is not a known element
body: <p>I just updated to RC6 and have trouble with the following error:</p>
  
  <blockquote>
    <p>zone.min.js:1 Unhandled Promise rejection: Template parse errors:
    'sidebar' is not a known element:
    1. If 'sidebar' is an Angular component, then verify that it is part of this module.
    2. If 'sidebar' is a Web Component then add "CUSTOM_ELEMENTS_SCHEMA" to the '@NgModule.schema' of this component to suppress this message. ("</p>
  </blockquote>
  
  
  
  <p><code>sidebar</code> isn't a component. Just a html-tag i am using in one of my templates. They look like this:</p>
  
  <pre><code>...
  &lt;sidebar class="main-nav"&gt;
      ...
  &lt;/sidebar&gt;
  ...
  </code></pre>
  
  <p>I tried updating my NgModule AppModule with <code>CUSTOM_ELEMENTS_SCHEMA</code> like this:</p>
  
  <pre><code>@NgModule({
      declarations: [...],
      providers: [...],
      imports: [BrowserModule, routing, HttpModule, FormsModule, TranslateModule.forRoot()],
      bootstrap: [AppComponent],
      schemas: [ CUSTOM_ELEMENTS_SCHEMA ]
  })
  export class AppModule { }
  </code></pre>
  
  <p>But that doesn't seem to do anything.</p>
  
  <p>Does anyone haven an idea or a hint?</p>