Can't access website if I add "www" in prefix
<p>I have successfully hosted the website <code>http://etutionhub.com</code> which is working fine so far but the issue is that I cannot access it if I add prefix (www) before the url.</p>

<p>What could be the issue here? I am sure my domain dns setting are fine which are attached below.</p>

<p><img src="https://i.stack.imgur.com/BTtLb.png" alt="domain dns settings"></p>