On the page that you have inserted the slider, go to "Settings" panel
In the "Head" section there should be something like
<!--% Start of the headers for CoffeeCup Responsive Content Slider %-->
<link href="cc-slideshow-fd8f329e/css/slideshow.css" rel="stylesheet">
<script>document.createElement( "picture" );</script>
<script src="cc-slideshow-fd8f329e/js/picturefill.js" class="picturefill" async="async"></script>
<link rel="stylesheet" href="https://fonts.googleapis.com/css?family=Josefin+Sans">
<link rel="stylesheet" href="cc-slideshow-fd8f329e/css/main.css">
<script src="cc-slideshow-fd8f329e/js/jquery-1.8.2.min.js"></script>
<script src="cc-slideshow-fd8f329e/js/revolver.min.js"></script>
<script src="cc-slideshow-fd8f329e/js/slideshow.js"></script>
<!--% End of the headers for CoffeeCup Responsive Content Slider %-->(different slide show name of course)
In your resources there should be a folder "CC-Slideshow-(name of slideshow) inside this folder all all the files required to run RSC
If it's not showing at lower breakpoints (mobile first) it is possible that you haven't populated the HTML element with the embedding code. (possible not for sure) at those lowest points