OpenCart upgrade 1.5.6. to 2.3.0.2
<p>I upgrade OpenCart from <code>1.5.6</code> to <code>2.3.0.2</code> it was upgrade successfully  and admin login work good but store front page not working, it's getting error.</p>
<p>The example.com page isn’t working</p>
<blockquote>
<p>example.com is currently unable to handle this request.</p>
<p><code>HTTP ERROR 500</code></p>
</blockquote>