Overlay extension doesn't load JS

Extensions
3

Hello, thanks for your reply.
my html looks like so:

<body>
<div class="searchbarDiv">
    <input id="searchbar" onkeyup="getRequestedHero(event)" type="text" placeholder="Search hero..">
    <button class="button" style="vertical-align:middle" onclick="clearButton()"><span> + </span> </button>
</div>
<div class="boxDiv" id="boxDiv"> 
    <div class="tooltipDiv" id="tooltipDiv"></div>
    <div class="labelsDiv" id="labelsDiv"></div>
</div>
<!--import extension helper library -->
<script src="https://extension-files.twitch.tv/helper/v1/twitch-ext.min.js"></script>
<script src="script.js"></script>
</body>