Drawer Footer Animation

Site URL: https://kccbd.net

Hey there! I had recently purchased a plugin where the footer of my website would essentially slide out from the bottom of the page when scrolling down to the bottom. However, after applying it via code injection, it simply extended the footer with large, white empty space. I'm not sure if anyone would be able in identifying the rationale to it not working. Thank you so much!

The code used is as follows:

<style>footer {position:fixed;left:0;bottom:0;width:100%;box-sizing:border-box; max-width:100vw !important;z-index:-9;} footer .sqs-layout {word-wrap: break-word; width:100%;max-width:1200px;margin-left:auto;margin-right:auto;} html{background:#fff !important;}</style>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.2.0/jquery.min.js"></script>
<div class="footerbox" style="pointer-events:none;">
</div>
<script>
$(function(){
$( ".footerbox" ).insertAfter( $( "body" ) );
});
</script>
<script>
$(window).resize(function(){
var footheight = $("footer").outerHeight();
$(".footerbox").css({height: footheight});
});
</script>
<script>
$(function(){
var footheight = $("footer").outerHeight();
$(".footerbox").css({height: footheight});
});
</script>

Additionally, this is the URL to the website where I had purchased/accessed the code as an example of it in action:

Drawer Footer Squarespace Plugin — SquareStudio

I've checked that the class footerbox cause the space

Try adding to Home > Design > Custom Css to hide it

.footerbox {
  display: none;
}

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Thank you for responding. After applying the piece of code, it did indeed hide the blank white space; however, the footer still doesn't slide out from the bottom of the website as it is supposed to. Not sure if there is an issue within the coding itself that is preventing such from occurring?

Thank you.