No parallax plugins are working for my website

Question

I'm trying to use the Stellar Jquery plugin to have a parallax scrolling on a background image, but it does not appear to be working, I've tried many different variables

<script
  src="https://code.jquery.com/jquery-3.3.1.min.js"
  integrity="sha256-FgpCb/KJQlLNfOu91ta32o/NMZxltwRo8QtmkMRdAu8="
  crossorigin="anonymous"></script>
  <script src="js/jquery.stellar.min.js"></script>
<script src="js/script.js"></script>

I put my script tags after the body

<section class="hashtag" data-stellar-background-ratio="0.5">

This is the section I'm trying to apply the scrolling

I've done everything -> background-attachment:fixed; , $.stellar(); I cant find the issue , doc for reference -> Doc