title: Modal show up but could not see the content
body: <p>This is my modal:</p>
  
  <pre><code>&lt;div class="modal fade" id="myModal" tabindex="-1" role="dialog" aria-labelledby="myModalLabel"&gt;
  &lt;div class="modal-dialog" role="document"&gt;
      &lt;div class="modal-content"&gt;
          &lt;div class="modal-header"&gt;
              &lt;button type="button" class="close" data-dismiss="modal" aria-label="Close"&gt;&lt;span aria-hidden="true"&gt;&amp;times;&lt;/span&gt;&lt;/button&gt;
              &lt;h4 class="modal-title" id="myModalLabel"&gt;text&lt;/h4&gt;
          &lt;/div&gt;
          &lt;div class="modal-body"&gt;
              &lt;p&gt;Done!&lt;/p&gt;
          &lt;/div&gt;
          &lt;div class="modal-footer"&gt;
              &lt;button type="button" class="btn btn-default" data-dismiss="modal"&gt;Okay&lt;/button&gt;
          &lt;/div&gt;
      &lt;/div&gt;
  &lt;/div&gt;
  </code></pre>
  
  <p></p>
  
  <p>This is my link:</p>
  
  <pre><code>&lt;a class="btn btn-success" href="http://example.com" data-toggle="modal" data-target="#myModal"&gt;Text&lt;/a&gt;
  </code></pre>
  
  <p>When I click to the button the modal is activating but I cannot see anything from it just the screen got darker.</p>
  
  <p>Could you please help me what am I doing wrong?</p>