title: Drupal 7 iframe with .html file located inside theme
body: <p>I have a theme which contains a folder called "user_news". The folder is in my_theme/user_news. And inside that folder I have an index.html file which I want to load in an iframe on my Drupal 7 site. </p>
  
  <p>I tried this: </p>
  
  <pre><code>&lt;iframe src="&lt;?=variable_get("portal_link", NULL);?&gt;/my_theme/user_news/index.html" width="600px" heigh="500px"&gt;&lt;/iframe&gt;
  </code></pre>
  
  <p>The iframe is placed on the front page of my site. But it always shows a 404 page.</p>
  
  <p>Any ideas what might be causing this. 
  And even when I copy the full link and place it in the url bar in the browser, it shows a 404 (i.e: <a href="https://portal_link/my_theme/user_news/index.html" rel="nofollow noreferrer">https://portal_link/my_theme/user_news/index.html</a>).
  When I do the same with a css file for example (<a href="https://portal_link/my_theme/user_news/css/main.css" rel="nofollow noreferrer">https://portal_link/my_theme/user_news/css/main.css</a>) it loads perfectly fine. </p>