Why this code returns 410 error???

[epicfails1234567890-crypto]

Why this code returns 410 error???:

<div id="f1"style="max-width:100%">
    <div id="game"></div>
</div>
<script type="text/javascript">
    EJS_player = '#game';
    EJS_gameUrl = './rom.nes'; // Url to Game rom
    EJS_gameID = 6; // ID in your website, required for netplay.
    EJS_core = 'nes';
</script>
<script src="https://www.emulatorjs.com/loader.js"></script>
<script>
render=()=>{
    requestAnimationFrame(render)
    f1.style.width=innerWidth
    f1.style.height=innerHeight
}
onload=()=>{
    document.body.style.margin=0
    render()
}
</script>

Im sure the rom.nes file is located into the same folder as index.html file.

Im using https://smb-by-mad-dr-cris.surge.sh web as displayed.