I have my index page head section as follows:

```
    <!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge chrome=1" />
    <link rel="stylesheet" href="bootstrap-3.2.0-dist/css/bootstrap.css" />
    <link rel="stylesheet" href="bootstrap-3.2.0-dist/css/bootstrap-theme.css" />
    <link rel="stylesheet" href="bootstrap-3.2.0-dist/css/bootstrap-theme.css.map" />
    <link rel="stylesheet" href="bootstrap-3.2.0-dist/css/bootstrap-theme.min.css" />
    <link rel="stylesheet" href="bootstrap-3.2.0-dist/css/bootstrap.css.map" />
    <link rel="stylesheet" href="bootstrap-3.2.0-dist/css/bootstrap.min.css" />
    <title></title>
</head>

```

Until this morning, the page always used to load fine. But I noticed this morning that css isn't loading at all. I checked the locations of css files. It seems to be correct. Can anyone suggest whats wrong?