title: Flask return 304 error for view
body: <p>I'm working with flask and I do not get the view for my web page. Flask server return me that </p>
  
  <pre><code>127.0.0.1 - - [17/Feb/2018 15:26:09] "GET / HTTP/1.1" 200 -
  127.0.0.1 - - [17/Feb/2018 15:26:09] "GET /static/vendor/bootstrap/css/bootstrap.min.css HTTP/1.1" 304 -
  127.0.0.1 - - [17/Feb/2018 15:26:09] "GET /static/vendor/font-awesome/css/font-awesome.min.css HTTP/1.1" 304 -
  127.0.0.1 - - [17/Feb/2018 15:26:09] "GET /static/vendor/magnific-popup/magnific-popup.css HTTP/1.1" 304 -
  127.0.0.1 - - [17/Feb/2018 15:26:09] "GET /static/css/creative.min.css HTTP/1.1" 304 -
  127.0.0.1 - - [17/Feb/2018 15:26:09] "GET /favicon.ico HTTP/1.1" 404 -
  </code></pre>
  
  <p>my _nav.html. the links to the css and js files are there. </p>
  
  <pre><code>&lt;!DOCTYPE html&gt;
  &lt;html lang="en"&gt;
  &lt;head&gt;
      &lt;meta charset="UTF-8"&gt;
      &lt;link href="{{url_for('static', filename='vendor/bootstrap/css/bootstrap.min.css')}}" rel="stylesheet"&gt;
      &lt;link href="{{url_for('static', filename='vendor/font-awesome/css/font-awesome.min.css')}}" rel="stylesheet" type="text/css"&gt;
      &lt;link href="{{url_for('static', filename='vendor/magnific-popup/magnific-popup.css')}}" rel="stylesheet"&gt;
      &lt;link href="{{url_for('static', filename='css/creative.min.css')}}" rel="stylesheet"&gt;
      &lt;title&gt;Title&lt;/title&gt;
  &lt;/head&gt;
  &lt;body id="page-top"&gt;
  
      &lt;nav id="mainNav" class="navbar navbar-default navbar-fixed-top"&gt;
          &lt;div class="container-fluid"&gt;
              &lt;!-- Brand and toggle get grouped for better mobile display --&gt;
              &lt;div class="navbar-header"&gt;
                  &lt;button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#bs-example-navbar-collapse-1"&gt;
                      &lt;span class="sr-only"&gt;Toggle navigation&lt;/span&gt; Menu &lt;i class="fa fa-bars"&gt;&lt;/i&gt;
                  &lt;/button&gt;
                  &lt;a class="navbar-brand page-scroll" href="#page-top"&gt;Start Bootstrap&lt;/a&gt;
              &lt;/div&gt;
  
              &lt;!-- Collect the nav links, forms, and other content for toggling --&gt;
              &lt;div class="collapse navbar-collapse" id="bs-example-navbar-collapse-1"&gt;
                  &lt;ul class="nav navbar-nav navbar-right"&gt;
                      &lt;li&gt;
                          &lt;a class="page-scroll" href="#about"&gt;About&lt;/a&gt;
                      &lt;/li&gt;
                      &lt;li&gt;
                          &lt;a class="page-scroll" href="#services"&gt;Services&lt;/a&gt;
                      &lt;/li&gt;
                      &lt;li&gt;
                          &lt;a class="page-scroll" href="#portfolio"&gt;Portfolio&lt;/a&gt;
                      &lt;/li&gt;
                      &lt;li&gt;
                          &lt;a class="page-scroll" href="#contact"&gt;Contact&lt;/a&gt;
                      &lt;/li&gt;
                  &lt;/ul&gt;
              &lt;/div&gt;
              &lt;!-- /.navbar-collapse --&gt;
          &lt;/div&gt;
          &lt;!-- /.container-fluid --&gt;
      &lt;/nav&gt;
  
  
  &lt;/body&gt;
  &lt;/html&gt;
  </code></pre>
  
  <p>I do not get anything like view in my browser</p>
  
  <p>NB : It's a bootstrap template</p>