 <p>Check that the CSS file path you are provided in page is right.</p> <p>for example :</p> <pre><code>&lt;link href="css/site.css" rel="stylesheet" type="text/css" /&gt; </code></pre> <p>the above line should be inside head tag</p> <p>here "css" folder is inside project root directory, and site.css is inside that "css" folder</p> <p>so check the path of css file </p>