CriticalJs broken with Foundation

[FossPrime]

The current templates produce a 25 line (after beutification) css file that has almost nothing. Looking into it. This is the index.css file I get after beauty, which doesn't do much and does more harm then good:

@charset "UTF-8";
html {
    font-family: sans-serif;
    -ms-text-size-adjust: 100%;
    -webkit-text-size-adjust: 100%;
    font-size: 100%;
    box-sizing: border-box
}
*, ::after, ::before {
    box-sizing: inherit
}
body {
    padding: 0;
    margin: 0;
    font-family: "Helvetica Neue", Helvetica, Roboto, Arial, sans-serif;
    font-weight: 400;
    line-height: 1.5;
    color: #0a0a0a;
    background: #fefefe;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale
}
body, html {
    height: 100%
}